Ken- yeah, when you factor everything in, it really isn't that much faster than hiking. However, it does give your lower body a rest, and it's super fun.
Eugene- that is what pee breaks are for...giving the legs and butt a rest! Actually, you can stretch out your legs in an appropriately sized Alpacka.
I did this run solo, but this weekend the wife will be joining me. She's a trooper.