Denny, Welcome! Having grew up with every type of rv from overhead campers, bumper pulls, class A,C,B.
I am sure you realize that yes even a "glass" travel trailer can leak. But less likely than a stickie. And maintence is far less on our Casita
than any Rv my Dh and I have ever owned. That being said they are not perfect just as close to as you can get for the type of rv they are. I would also like to suggest anything Bigfoot
(since your use to larger) or the EggCamper
and of coures all the other brand options. And would suggest trying to get to any of the rallys being held this spring and summer.
Scamps are insulated, as well as Casitas, bigfoots, ect. As far as outside noise
not any worse than any other rv. Heating and cooling, I don't notice any huge difference in cooling other than it's way faster to cool down our Casita
than it was to ever cool down on of our Class A's. But believe that is due to the size!
I truly recommend looking at as many options as you can. I know it's hard due to availablity in your area but in my opinion worth it! Can't help you with the wood option other than to say, I have been in a few older Scamps that had it and it's a beautiful look. Well again Welcome, have fun finding just the right trailer.