You can bring as much alcohol as you want. The only real "Rule" is you cannot bring in any glass bottles, camping or into the shows. You can also bring a small cooler that can fit under your chair into shows. My group usually camps in overflow and I know there and i would suspect other places there are no fire rings. You either need to bring one or bring a shovel to dig a hole for a fire. One vehicle is allowed per campsite. If you have more there is another field by overflow you can park and I believe it is 20 or 30 dollars to park there for the week. You can bring your camper as early as Saturday, the week before the shows start. This is also when you can put tarps down to "claim" your spot. Otherwise you can bring your camper in whenever you come to camp. It depends if you are coming early (like Wed.) or later like the wknd. We usually come Wed and it is fairly easy to get your camper in. If you come on the wknd you then have to maneuver around all the other campers. Also don't forget about chair line on Wed. This is how you get seats at the show.
Hope this helps. :) -Kristin