When I was 1 and my family was living in Aus, we'd go camping in the Outback: Mum, Dad, and four kids (1, 3, 5, and 7!). So obviously it is possible, although Mum thinks we were all pretty much textbook. If it's tent camping and you have a two-part tent, there might be a way to black out one part for Caleb and leave the other part of the tent for the two of you. Otherwise, is there any way you could take a van? By pulling out two rows of seat, you could convert it into living space. Then you would have a mobile blacked-out space for him and could just pull over for his naps and he'd be able to play in it during the day if you're both busy at the time and can't be running after him.