If your looking to rent from a company(not private person) I would suggest 7's Only, http://www.sevensonly.com/ if you are familiar with Buttonwillow they are the shop on your left right after you enter the main gate. They bring a full trailer to the February school, as most people that rent, rent from them. They also bring several spare cars should something happen, so you know you will get through the school.

Best of luck