A prior owner of our Campster
, which is very similar to yours, removed every thing from the walks. We have bare painted fiberglass. It looks ok and functional in nice weather. However, on a rainy day with two humans and a dog in there, it turns into a terrarium. Some kind of insulation with an attractive surface would be ideal. I think in our case we have agreed that it is a fair-weather trailer and we will live with it as is.