Yes, I did experience this in my last coach, also a '98. It did result in a (very) rotten and damp floor.
I hate to break it to you, but the damage may be worse than you expect.
When Sunline built it, they put down a piece of flooring over the entire coach, before anything went on (even walls). Then, they put a second piece of flooring over the area where the final finish was the vinyl. It did overlap the carpeted area quite a bit. In your case it probably goes up under the bed and stops just shy of the front. Maybe not though.
Then Sunline put carpet over everywhere where carpet went, and finished the edges.
My damage occurred in the kitchen area where there were two layers of flooring. I could see a little discoloration inside one of the cabinets and just a very small amount in a corner. Once that top layer was pulled up though, it was all badly discolored everywhere, but worse in the spots where it showed through the next layer.
I think my problem was from the previous owner not winterizing it correctly. The trap under the kitchen sink froze and cracked, so water ran down the pipe to the floor for many years.
Basically the only repair is to cut out the flooring and wood and replace it all. It's not an easy job but it can be done with not a whole lot of time and actually pretty cheap. If you were determined, I think you could complete the main repair in a weekend and then put the final floor covering down the next weekend, or even in the spring if you wish.
I'd recommend doing it before winter though because the wet wood can freeze and swell, which can cause a whole mess of new problems.
2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9467.8 (as of 5/26/19)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR