I dont know how sheltered, or domesticated this kid is, but. When son was in cub scouts, I remember going on the first camping trip, and being dumbfounded by some of these 1st/2nd grade kids; one had a snotty nose, and asked if anyone had tissues. No, just do a farmers blow. He had no idea what that was. Just being able to run around a bit feral and pee in the woods, I think many of us take for granted.
My advice would be, don't over do it, or force too much. It might annoy you, but if he's propped up by the campfire, half paying attention, and half on his phone, that's a win. Forcing a kid to sit in a boat fishing from 4am-9pm, whether you catch anything or not, hungry, bored, and sunburnt, probably isn't gonna win you any favors. At the same time, he might need a bit of a push, and thats OK too, just don't keep pushing.