We allow generous use of drop bags but ask that you go easy on the size and weight. The aid stations really are well supplied. Bags exceeding the size limits of 10 pounds or so, or 20" x 20" x 3" will not be taken, nor will bags that we do not think can endure being loaded into a truck then driven up a bouncy four wheel drive road! (Yes, I'm talking about plastic shopping bags. C'mon, you're an ultra runner now and surely deserve a bag from High Desert Drop Bags, don't you?!).