If you want to get a good spot, you ll have to get there before noon (seriously). As the previous poster stated, if you leave your pen you won t be allowed back in, even if you just need to use the bathroom. Apparently, some people wear adult diapers in order to solve this problem. You might also want to look into buying hand and feet warmers, since it can get super cold out there (last year it was about 18 degrees for the low, and only 35 for the high). There are no backpacks allowed.As for performers, you ll probably just have to google it.
Dress warm and get there early, because the area can get filled fast. Also, consider staying there a long time, because if you leave your designated area for anything, you ll be out of luck.Good luck