Don't be so set on fiberglass. Aluminum works just fine. Having had both I don't see much advantage of one over the other. Also IMHO you are better off with a portable generator, and honda or yamaha for the quiet. When it comes to towing you are so much better off with a camper that ends where the bed does...no extension. 8' is really enough once you get used to it. You can still get a wet bath, big enough kitchen, enough seating, etc. I'd never go back to a bigger camper, things are just so much simpler. And on my 3500 I can barely tell the camper is back there.