OK, so I'm finally making it up to DGRR and I'm all sorts of stoked up

. Car is almost 100% (runs perfect, just need some more cosmetic tweaks and a brake fluid flush) so I'm thinking about what needs to get packed.
So, what are must-have items for the event?
I've heard mention of walkie-talkies since cell phone coverage is weak up there. Any preference?
I would think a cooler with drinks would be a good idea. Are snacks/drinks readily available?
Sunscreen?
Any ideas here, I'd love to hear 'em!
Dale