Some activities don't really fit the character. Like a nerd wouldn't play tug of war or A fire monster wouldn't swim. I'm not saying skip all activities but allow one skip per day (day at camp, not in real life.) That way if it so happens something doesn't suit a character we don't have to break character to comply with the activity. And maybe have a schedual each day saying what we will do that day at camp (once again a camp day not real day) That way we can plain which to skip.