Primarily, you need some space and a good source for water (garden hose). Being wintertime, shelter would be nice, depending on the weather, something well ventilated (I have an EZup I could bring, if needed). On the plus side, wee don't need fridge space to keep the beers cold!
Other than that someplace to sit and BS and eat. All those details usually get worked out as the date approaches...
Welcome aboard.
-John