My early thoughts considered a roll-off design, using a cargo trailer or camper and slicing the top 2 feet or so, and putting that on a rail to slide either forward or back off the trailer, opening up half the trailer to the sky. This had a lot of challenges around sourcing a rail large enough that didn’t require support (basically a huge drawer slide). Also challenges in what to do about the doors, and sealing it from insects, water, etc.