The most memorable was at Little Molas Lake campground at Molas Pass, Colorado. I had been there before by myself. Then I took my 8 year old granddaughter there. At that time, it was a small camping area with no amenities. I just now looked it up and it appears they have done a lot of upgrading since then.
Anyhow, the Colorado Trail runs right through it. We walked a part of it. Backpackers would stop there overnight. We met an older man and his grown son on the trail. I told them that if I were ten years younger, I would do that. A bit later, as we were climbing up a hill to the campsite, my GD asked me if I could wish for anything, what would it be. I thought about it for a few minutes and said, "I don't know. I have everything I need and I'm happy with my life." She replied, "Grandma, you could wish to be ten years younger." I stopped dead in my tracks, turned around and looked at this young girl, wondering where she acquired such wisdom at her age.