As with many (most, it seems) others, when the kids hit high school / 16 years old other things as part of normal growing up interfere.
Our daughter got a little tired of camping probably when she was around 14. Son still wants to camp with us at 23 years old, but it is hard to schedule.
When our kids were younger (pre-teen), we went to a lot of resort campgrounds with pools and activities, and also campgrounds near touristy areas. As they got older, we more and more started going to limited hook up or no hook up campgrounds and did a lot of hiking and bicycling. Seemed to work well with the kids.
That has been our experience!
