re. the wood floors in trailers, I second what John said about keeping them clean........but not sure how often it is needed,either. The guys seem to wash ours out fairly often, but sure not after each use. Guess it depends on how wet the 'mess' in it is, AND how soon they are going to be sleeping in the front end of it on a Buckaroo ride, or a wagon train trek!!!
We have the rubber mats and I'm not sure if floors are wood or aluminum. I know we had a wood floor, and think we still have all but the first trailer we had (and that was a LOT of years ago), but one does have to take care of them and watch out for rotted wood. A foot through a trailer floor is not a pretty sight, as well as costly, after a few miles!!!!
We really like the salvage rubber matting one can buy at Union Center, SD. Have it in our horse barn over real small rock and it drains well, and is easy to pick up the 'road apples' off it. The main reason for it, though, was we had horses that pawed big holes in the dirt floor when tied in stalls overnight. No more of that, now. It would cost lots more now than years ago when we did it, even just to haul the rock, tho we probably didn't put down over 2-4" of it.
mrj