At what age did your kids stop camping with you?

My kids stopped at about 16-17 when jobs, HS sports, and access to Facebook became more important. They're now college students and while our time is very limited because of other commitments they have, both have expressed interest in trying to get out again. Currently planning a 4-day weekend with my son the week after the community pool closes (he's Head Lifeguard) and just before he heads back to college for his Sophomore year.