Bedlam is a tricky map, its dark and there is no difinitive safe zones where your team can just hole up and not worry about attack from behind... as KF should be to be fair
A favourite spot right off the bat is that blue corridor off to the left of where you spawn. A reasonably competant team should be able to handle it.
Another popular one is if you go into the courtyard from the blue corridor and go up the stairs, head straight ahead, round the corner and sit in the corner ahead of you the spawns are pretty easy to control.
The biggest difficulty with this map, jsut like Hospital Horrors is getting back to those spots during the trader waves. Its easy to do if you know where you are going, but if you aren't familiar enough with the map then you are going to struggle. So my advice is to simply run around the map a few times in solo, and jsut try and learn the layout. Once you do it becomes miles easier
