I'm a freshman at UF and am trying out for the drumline. There are weekend camps throughout the summer, your cousin should look into them if he'd like to try out. Google UF band or UF FDL and you should get the link. I went to a camp back in May, loved it, but haven't been able to make the others. The general impression I got was a very "chill" atmosphere, but at the same time its college drumline and will involve work. The staff was very laidback, which is nice imo. As far as "how good" the drumline is, I've seen them plenty of times, and they've always been pretty good, getting better each year. Nothing like FSU, but the mission statement of UF's drumline isn't quite what FSU's is. FSU also hasn't seen a bowl game in a while, and you can imagine how much fun those are. There's plenty of vids on youtube he can czech out as well.
But yeah, if he's interested the next camp is July 26th. I'm at UF right now, if he needs a place to stay I've got plenty of room in my dorm to save some hotel cash, especially if its a far drive. Just email me or pm (email is better).
-Scott