RV Repair: Rotten Floor, mallard, fleetwood

Question
The flooring under the rear of my 2000 Fleetwood Mallard, under the bathroom, has rotted out needing to be replaced. What is the best way to go about replacing it? This is a rear bathroom model that includes cabinet on one side of the bathroom with the tub on the other outside wall. The vanity is centered on the back wall with the toilet offset to the left of the vanity. The only other problem is that the right rear exterior wall might have some camage too, down low. Any suggestions ?

Answer
Roger, Look at it this way. Pull the outside metal off to expose the walls around the bathroom. They only need to be up high enough to separate the wall from the floor. You will find screws that hold them together. Then depending on what it looks like you can either pull the cabinets or whatever needs pulled inside and cut out the bad. Then cut the new piece to fit in where the old came out from and frame around any place that has been cut and has no frame there. That way when you screw it all down they will match. I hope this helps some and if any more is needed ask. Thanks, Bill