>>2539759>it gets wet then the duct tape fails and my blinds fall downI want to support you because I'm all about car camping, but if you can't even use your ingenuity to solve this problem you're not gonna make it. Rig up hooks or a curtain rod or something.
As for ventilation, like other anons have said you will obviously need a vent. Maybe get a computer case fan to blow out that humid air, I think you could run a tiny case fan off your car battery overnight without draining it too bad. Just cut a square out of the truck cap material somewhere, buy a vent cap at Home Depot or Amazon and install it with epoxy
