The great thing about modern Tent Trailers or Pop-Ups is that they are not made out of Canvas anymore. They are made out of a heavy duty UV stable vinyl. Our Coachman Clipper is very similar to the Rockwood (if I recall, they are made int he same factory), and the vinyl is reported to be 22 years UV stable in direct sunlight. The other nice thing, they are not "mold friendly". We try to let the trailer dry before ever putting it away, but it has had to be closed up for a few weeks, never have any mold issues at all. A wipe and it is good to go. They also clean up nicely with dish soap and warm water.
The other thing I like about the vinyl, it is fleece lined on the inside. This acts as sudo insulation, but more importantly it stops condensation and is again, not mold friendly. Kool little trailer, we looked at a Rockwood exactly like that one, but my wife said it was too small? My XJ can tow the Coachman all day long, so we opted for the larger setup.
Good thread.