More new alum skinned campers than fiberglass

The problems with flat aluminum panels is they have plenty of overlapping joints that have to be maintained to avoid leaks. Go hang out on the Airstream forum for a while.....those guys fight leaks in everything from brand new trailers to older ones. Do a search for floor rot, and sit back for months of reading about water intrusion that has destroyed floors, frames, etc. Not trying to run down Airstreams, just pointing out that all trailers need to be looked after carefully and constantly, or water will find it's way in.