I'll be flying in Monday night, renting a car, and driving up on Tuesday, I think. I imagine there won't be many folks wanting a ride up that early, but I can take stuff for folks, and I'll have room coming back Sunday, too. I rent with National, so I usually grab something on the larger side like a midsize SUV or minivan, depending on what's available in the exec aisle, which means I'll probably have a fair bit of space to spare, but I also won't know how much til I get there.
On supplies, I generally just pack food for breakfast and snacks (especially high protein quick snacks for when im heading to bed and realise I forgot to eat a real meal), and enough drinks/mixers to share. There's generally camps you can donate to/volunteer with that serve community meals, and IIRC, the resort had their cafe operating, too. I think Ada's usually does a pop-up, too? If there's one thing I always end up bringing home unused, it's food, but I'm also prone to forgetting to eat when I'm having fun. YMMV.
-op