Would camping inside air conditioned comfort be mandatory or an option with camping spaces still available outside? If optional I think it would be a great way to plan for unpredictable contingencies like record heat, heavy rains, etc. I'd be willing to spend a few bucks more so those unable to handle extreme conditions would have an alternative. For me personally, it would have to be pretty extreme for me to camp inside. Conditions at the last rally prevented me from attending because I had no way to protect my dog from the heat, but if A/C had been available I wouldn't have worried so much about that fur coat of his.