Need info about atv riding in TN

Hello all,

I am new here and have some questions that I am seeking answers to. If anyone can help, it would be appreciated. I use my atv mostly as a yard tractor but have been thinking about doing some riding, primarily for photograpy. Can someone tell me what is required for riding on the public atv trails in TN, such as, does the atv need to be registered/licensed, is proof of insurance required? Is there any other information that I need to be aware of?

Thanks for your comments.