You are perfectly allowed to have your medications (we want you to stay healthy!). Over the counter medications are allowed at Bonnaroo in reasonable personal quantities. If you are bringing prescription medication, please make sure to bring a valid photo ID that matches the name printed on your prescription, and that any pills are in their original packaging, match the description, etc..
If you need to refrigerate any medication (including insulin), please stop by any medical tent and someone will assist you.