We met most of ours at our daughters sporting activities (softball & soccer). We became friends with their teammates parents while hanging out during practice and games.
We didn't own a camper so we rented different campers for several years. Our families passion for camping spun from there.
Over the years we have all drifted in different directions. My oldest DD is now 34 and youngest DS is 25. As far as I know none of them are still in touch with the kids they camped with nor are we with their parents.
We currently do not have camping buddies and kind of like it that way.