Also, lots of people here and on the Scamp
forum have done major floor repairs and were very helpful a few years ago when I tackled mine. It is a dirty job and it feels like you are going to ruin the trailer half the time, but it is not technically difficult. And you will learn a lot about fiberglass and resin.
Post a better description of how bad the wood is and you may get more advice on how to handle it.
Side note: most scamp
floor rot comes from interior leaks
. You have to fix the leaks
or your new floor is doomed.