With the Scamp
you are trading fiberglass repair for no wood in walls and roof. Sounds like a good trade off to me. And fiberglass repair is all about learning just one material, whereas traditional RVs have a combination of wood, aluminum, some laminated stuff, on and on. With YouTube a handy person can master fiberglass.
Just treat it as one more material to master. Kind of like plumbing, went from learning copper to PEX. Materials change.