Activities List for College Applications - "pay to play" activities should be minimized or avoided?

Someone earlier in the thread asked how a student would explain what they did over the summer if they didn’t include their pay to play activity. I’m a bit confused by this as the Common App doesn’t ask kids to write what they did over the summers, just list their activities. So my son, for example, only mentioned things over the summer that tied into to ECs (band camp or volunteering, etc.) but didn’t include things that he did over the summer that didn’t fit within one of those categories. My D went to an outdoorsy camp for teens several summers where she hiked, climbed, boated, etc. I wasn’t thinking that she would mention that on her application. Should she? And, if so, where and how would you fit that in?