You should email firstname.lastname@example.org and tell Laura about your situation, she'll take care of you. You can also ask your Dr. for a temporary handicap tag.
This. Best advice you'll get in this thread. Laura will get you in Access Camping and you'll be surrounded by tons of people CLOSE to the entrance. Post in that thread and you can get to know some of the others also camping in Access camping.
If you're new and want to make some lifelong Bonnaroo friends go check out the Bonnaroots Community Dinners put on by Oxfam America and Eat for Equity! They fight global injustices and hunger worldwide and use these community dinners made up of farm-to-table ingredients, 100 strangers, and special surprise guests to raise money for their causes. You get to sit outside with a home-cooked meal surrounded by new friends -- what's cooler than that? Check out their site and sign-up! And if you don't want to pay, you can volunteer at the dinners and still get fed and be a part of this awesome experience! Go here =)