Never leave your drop bags with the crew! Imagine you are coming into an aid station to pick up your night time gear, your crew gets a flat tire and misses you at the aid station. Wow, what do you do now? I always rely on the aid station folks to have my bags, they have several hours lead time to get your stuff to the aid station even if they have an incident. My crew(wife and kids) always have a single bag to take to all the aid stations, this includes a variety of stuff like back up Petzl lights, batteries, GU, socks, first aid, xtra running belt in case one breaks and other back up items. This will insure you always have access to all types of gear all the time.