Great advice, everyone. I've had a pretty tame time at Muse gigs, to say the least. Worst pit was Fall Out Boy (lol) but that was a perfect storm of drunk frat boys and 14 year old girls who had never been in a pit and wanted Pete Wentz.
The best thing my group did was bring a big box of pop tarts. 1 box will work for a group of 3-4 and any that are left over, send them up the line. Packaged food is great. Sharing is caring, especially when sitting in line for 6+ hours.