I think there will be a couple booths at the show giving away lighters, and as they are no longer allowed on US flights [but sharp pointed objects under 4" ARE allowed ] you may have any in your carry-on OR checked luggage confiscated.

Advil and/and or motrin are a necessity--but don't bring tylenol. The ingredient in tylenol can really fuck with your liver if you are dehydrated, so stick with the other pain relievers.

Sunglasses are a good idea too. Its unlikely we will have snow two years in a row--the weather here in Phoenix has been fabulous the past 2 weeks with no end to the warm sunny days in sight. Be prepared for bright sunshine!

All good ideas posted here. One thing also to make sure you don't leave behind--
COMMON SENSE.
It can be a long hard 4 days and the lure of complimentary booze and drugs and easy sex can really push a body to the limit.
I stick with caffeine and cigarettes~