The first project I did on the travco I didn't have the presence of mind to take photos on.  We had some soft spots in the floor and so I took out the dinette, couch, and gross old carpet.  Indeed some areas were almost soft enough to put your foot through.  They were under the couch and between the dinette and the wall so I didn't discover them in the "pre-buy inspection" that I did.  The plywood floor in a Travco is protected from moisture underneath by a thick plastic membrane that is layed on top of the frame.  Above that was a foil backed insulation layer to reduce noise and heat transfer into the unit. Then on top of that was the 3/4" plywood.  

The floor is actually well protected from moisture underneath but what the factory never foresaw was moisture from above.  Apparently all the windows have leaked at some point.  Either that or condensation ran down the walls onto the floor.  Either way the end result was wet wood that eventually became real soft.  I wound up tearing up the floor from the step up to the command module (driving compartment) to the cabinets on both sides of the service module (living area).

There was laid bare the sins of the past with all the ad-hoc repairs and modifications to the electrical system.  We had a week long camping trip planned with friends (one of which now also had a Travco) so there was a deadline for repairs.  I was unable to locate the type of plastic sheet that had been use to protect the floor from water underneath so I elected to use a more temporary material - roll on pickup bed liner.  Several coats of that thick black stuff and it was pretty well waterproofed from below.  The side panels were water damaged and painted over so I got several of the "luan" panels from Home Depot and, using the old panels as templates, cut out new panels.  It took quite a while to find the right polyurethane stain combo and then it took a couple of coats and sanding in between but the side panels turned out quite nice.  

When the day came for the camping trip to begin I was not done.  My buddy with the Travco came by with his entire family all loaded up and ready to go but I was in a real funk from the thousand little problems I was having getting the Travco ready to go.  Well being the prince that he is he delayed their departure and helped me get everything put back together.  We got out of there around 6 or 7 pm with and hour or two left until dark and launched for our first Travco camping trip.  It was a great week out at Lake Crescent in August of 2006.