Dude I sooo want to try something similar with my Gen 1. My idea is to deck it out like a 2 man tent that I can fix to the tray behind the rear glass and yeet it over a roll bar (another side project thingy that will probably be from a modded one a-la U-Pull-It). I'd probably just have it slant back towards the tailgate instead of a full canopy like yours. Speakers would be a nice touch too. My other idea is to have a pair of seats facing rearward in the tray that can be taken out easily so I can take it to... the drive-in. The Subaru Brat is the inspiration for that one. They are really cool but we never got it optioned like the US models.