Christopher,
I don't see why you couldn't drive in and out each day. There were buses coming and going. We were literally in the back yard of two places to stay.
Should be even bigger and better next year. The campfire never went out all weekend, there was a live band Sat evening, potluck supper, coffee and doughnuts every morning. There should be more vintage campers and van people there next year as the word gets out.