If it were me, I would make 2 halves, bow to stern, and tie them together with an a-frame.
this way, you could run a ridge cap vent if you want to, but it might be overkill.
I doubt I’d really bother insulating it, as a second (thinner) sheet of aluminum or pretty much anything will work well as a radiant barrier.
In my days of roofing, the biggest thing is separating Thermal Bridges. Where your outer skin meets the tubing, is a direct contact transfer of thermal energy. It only takes about an inch for that to drop off to nearly nothing.
You can insulate it if you want, but it would be most effective to use less insulation and provide some type of air gap from your outer shell and your inner to reduce thermal bridging. I would leave some electrical up there just for the future for lighting.
I live in North Dakota so snow load is a thing for me. If you only raise or lower it once a year, (if you were to go that route) I’d just use a crank winch and cable for your power mechanism on a quick detach plate.
raise it up, install pins, lower it down, install pins, remove winch, ect.
the major benefit to having it lower able would be protecting interior while not in use instead of a pita-cover! Lol
