I just remembered something if it can help My garage is double wide and double deep, two f250s in front of two, deep garage and workshop.
I have a 45 foot +/- carport down the side. I just extended 12 foot 2x4s in line with the roof trusses, on top of some doubled up 2x6s, on top of four or five 4 inch posts. I built this ring in the back in about an hour.
My F250 long bed has a heavy Leer fiberglass cap on it. In the deep end, I put four 1-2”pulleys on the 2x4s near the corners of the cap, and I fed four small poly ropes to a bigger pulley in one spot on the side. On the end of the ropes by the truck, I quickly made four square head hooks from some 5/8 inch flat stock steel. When you hook the steel hook under the cab, it’s flat and too wide, and bent outward, so there’s no danger of scraping the side. The way I made the hooks and placed the pulleys, and I can pick that cap up about a foot with ease.
When I take the cap off the truck, I crawl inside, remove the clamps, and just push up with my back to pop it loose of the seal around the bed. Then I put a 2 x 4 in the front and a 2 x 4 in the back over the bed rails, so the cap is loose. I do the same thing when I put the cap down. It sits on the 2x4s, and then I can wiggle it into the right place and pull the 2x4s out. Back in the day, I could take the cap off and on in less than 30 minutes. Probably a weekend job for my old bones now.
Anyway, I have a half dozen friends who did the same thing in a simple way. They put four posts in the ground, are 2 x 4 or a 2 x 6 cross piece on top , and connected them with a turnbuckle cross for stability, so they can do the same thing for like $50.
If you have a spot out of the way, this might be an easy way to take the cap off and store it.
Finally, I have a winch from a boat trailer that I’ve considered rigging to pull the ropes to pull that cap off, but honestly, I’m not sure I will ever take it off again while I have the other trucks.
Hope it helps