Thanks for the replies.
I have gone shopping, bought some pressure treated 1" deck boards, pink foam, glue, contact cement , butyl tape, proflex caulking and some fir plywood
The plan is to use gorilla glue to fasten 1X2 on 16" centers for the connection to the bottom of the over hang. That will give me something to screw the floor to, and will also provide additional support through the area.
I picked up water soluble contact cement, and I will use this to glue the "pink" foam in.
We have thoroughly soak the camper and have not found any leaks.
Bigfoot left a space along the corner, about 1" X 1", it looks like a path to along any leakage or condensation, my guess it is a way for the water to drain out to the drain holes in the rear.
I have to get the unit back together, as we are heading out, mid June for Alaska's Kenai. If you have been there you know it rains almost every day in the summer.
Again thanks for the replies.
Bob