Parking
When you gain control, you'll be crawling through a smoky, fiery vent. Crawl forward until you exit the vent. The room you exit into will be kind of small but turn right and you'll find a small space that you can slide through. Slide to the end and you'll be back in what is left of your room. By the door leading out onto the balcony will be your suit "disguise" which does count towards the chameleon challenge. However, putting on your suit may cancel your "suit only" challenge. However, wearing only the robe will definitely get you the Suit Only challenge.
Either way, quickly exit the room and turn left. Run down to the end of the walkway and on your left you will see an ice box. Climb into the ice box and wait for your first target, Jennifer, to walk by. Her guards will go first and then she will walk by right behind them. Hop out of the ice box, strangle her with your fiber wire and then put her in the ice box. When she's dead, go down the end of the walkway and down the stairs that they originally came. Be quick because one of the guards will turn around and come back toward you.
On the way down the second set of stairs, take cover against the wall that breaks line of sight with the parking lot. Make your way to the bottom and transfer to the next wall to the right. Go to the end of this wall and be sure to pick up the brick before transferring to the next wall. Keep going until you get to the corner. Go around the corner and stop at the car.
When it is clear to do so, walk over to the column that the guard is standing next to. You'll need to do this manually because you can't just "transfer" over to it. Stay here for a moment and wait for the second guard to walk over to the car and then walk away to the right. Take the brick and toss it towards the back end of the car. This will draw the attention of the guard and when he walks over to investigate, walk out into the parking lot a couple of steps and then turn right. You'll see a hole in the fence by the wall. Go through that hole in the fence but only by a step.
Just past the fence will be a thug who's about to shoot a civilian. The guard is still considered a non-target casualty but it is much easier to shoot him and save the civilian. If you don't, it's very easy for him to spot you. There's nobody else looking this way and nobody close enough that they will hear him fall when you shoot him. Take him out and take his weapon. There are some other weapons across the course on a couple of boxes. Take these if you'd like. Make sure you grab the brick by the hole in the fence.
Continue to the right and use the walls of logs as cover. When you run out of log walls to transfer to, stop. There will be a couple of guards talking to your right, a path just behind them and then a path off to the left that has a single guard patrolling. Wait for the pair to finish their conversation and walk off. Then wait for the other guard to come to the end of the path. When he starts walking back, follow him up. If you can make it to the plants just to the right of where he stops, take cover there. If not, stop at the sign and then use a brick or some other object to distract him. Throw it towards the bar and then get over to that plant.
This part is a little tricky and will require you to pay attention. You need to wait for an opening so that you can get over to the bar area just in front of you. You may need to dance around the plants depending on where guards patrol to keep from being seen. When you can get there, jump into the ice box and wait. Heather should come over and stand near the edge of the bar. You should be able to get her when she comes down even if the guards initially prevent you from doing so. When she does, kill her and put her in the ice box. Then slip down the stairs and then find the exit nearby.
Reception
You'll be in a back room of a bar at the start of this area. To your left will be a door that you can slip out. When you get outside, you should see a walled off area that has grills. You want to try and get there but you'll have to be careful. There are quite a few guards that have a good view of the area between the hut and the walled off area so you'll have to be fast and gauge the reactions.
Inside the walled area, go over to the other doorway (watch out for the guard who comes in to kill the civilian). You should see one of the sisters there and to her left will be a gas tank. You may have to wait for the patrols to cycle through before you have a shot at the gas tank but when you do, wander over and sabotage it. Get back to the walled area and when the second sister comes over for a chat, shoot the gas to cause a massive explosion.
This will kill both targets and draw the attention of every guard in the area. Now, head back to the hut and from the hut, make your way over to the exit. You may have to use a wrench or a brick to distract a guard right at the exit but those are readily available by the two dumpsters in the corner of the map. Toss it over his head and pick the lock to leave.
Cornfield
This part isn't particularly difficult to do but painfully difficult to describe. Part of this is because there are many, many guards and very little in the way of scenery with which describe position. You'd be much better served by your own intuition on this one - at least as long you are actually in the corn fields. I will continue to describe the various points of interest however.
When you first enter this area, Candy Cain will be with a few guards who are talking. After the conversation, they will walk up the street a little ways. As they leave, scoot across the street and enter the corn field. From here, start forward and left. Your goal is a lone shack in the middle of an empty patch. Get to the right edge of the clearing around this shack and you'll see Candy enter the clearing. Wait for her to enter the shack and then wait for the guards to shift a position in their patrol. When they stop, find an empty spot to slip through and then enter the shack.
Kill Candy and dump her in the crate. Exit the shack and get back into the cornfield. Find the road leading away from the shack that start towards the back. Follow along this road until you see a trailer. If you aren't on the side of the road with the trailer, find a gap in the patrols to get over to the other cornfield. Between the two trailers in the middle of the road is a stack of boxes with a piece of Evidence. Wait patiently here and Jaqueline will come over to the trailer. After that, she will head into the cornfield to search. When she does, wait until she's got a little distance from a guard and then kill her. With her out of the way, cross to the other side of the road and continue along the side until you come to a small farm house.
Next to the farm house will a bell tower. If you get inside the bell tower, you can climb a ladder to get to the next level. From here, just wait for LaSandra to appear. She may do a round through the parked vehicles here. If she does, there is a pallet hanging from a crane that you can shoot and let drop on her. Sometimes it is possible that she will head into the cornfield instead. If she does this then simply follow her out and deal with her like you did the last target.
With all seven sisters dead, you need to make into the camp near the farm house. Between some of the cars and work stations will be a piece of cardboard on the ground with a ringing phone. You need to pick it up. To get to it, I found it easiest to move from the bell tower to the farm house. Then move up to the picnic table. From here, walk into the middle of the camping area and there will be quite a few things to break line of sight. Then you should be able to get to the phone pretty easily.
