Whenever I or a member of my hiking party uses a wag bag on the way up, we usually "stash" it for retrieval on the way down. We often find a way to run side bets to see who gets stuck carrying them out. Makes for a fun way to pass the time. We always try to hide them if possible and mark the spot on the GPS. We have never left a bag behind. I see no reason for them to travel to the summit if you are coming out the way you go in. The only time I've ever had a used wag on the summit is when I went up the MR and down the MT with Richard..............................................DUG