A friend of mine has chaperoned a few trips. They broke into groups of 5 kids per chaperone and stayed together with the small group the entire time. Her comment was that her group was the only one that did a ton of stuff because the other chaperones or groups didn't know how to get fast passes and have a plan. I would hope that, in general, the entire group will get some information on how to use time efficiently, if they want to do so.
Have fun!!