The busses come by on a regular schedule. That said, you can buy
mosting everything you need at Target, a very short walk from the
north side of the North 40. Buy a cooler with wheels, ice, drinks, food
and whatever else you need. Target sells chairs for cheap ($5 - $10).
When you leave you can leave them with you name on them and pick
them up the next year, a service that is very nice.
It will rain. I guarantee it
One trick we've done each year was to take a large screen tent, the one
with no floor and a nylon top. Get one big enough to put two sleeping
tents inside of it. Your tent will stay nice and dry and it will provide a
nice shelter away from the bugs.
See you there.