Generic brands are just as good as name brands. In something like a large plastic bag, pack one complete set of mundane clothing. Take out the chocks and tool kit. This way you will not be forced to unpack the whole trunk if you need the spare tire or tool kit, although, gettting your vehicle checked out before your leave should obviate this eventuality. You will be walking almost everywhere at the War.
Sunburn is insidious and invidious.
You're unaware of burning until the damage has been done. You are going to be outdoors a great deal at the War. If they construe a warning as a come-on, explain politely. People, including you, can go hyper under Pennsic stress. Remind people to eat.