In Left 4 Dead on the 360 were are the safest areas for each campaign finale?

I found a nice little gap between a pipe and a corner on the first campaign, but if a tank drops down there you can't really get out and you die. On the second campaign there's the rock out past the dock where the boat arrives that you can get on, but hunters and smokers can still get you when you're on there. I can't find anywhere on the third campaign, and on the 4th i only have the top floor of the barn. Just wondered if anyone else has any good places to take shelter?In Left 4 Dead on the 360 were are the safest areas for each campaign finale?
The pipe in the corner is for no mercy. But on the stairs two up and two down is the best and run fom the tank. The closet is okay also.





The barn is about the only really good place for blood harvest. you can kill the tank from the rafters.





In death toll the best place is a rock opposite the ';usual used rock'; by the dock. Some times you don't even get a tank and you only get a few zombies. But you need to throw pipes when the boat comes or you might get swarmed going to the dock.





In dead air there is the wing of the plane, a closet and of course the hill.