Sorry for the late reply but I just picked up your message. FYI - we rented a nearby house and drove in daily so we couldn't assist anyways.
I hope everything worked out for you.
If you end up going next year, please drop me a note. We are always happy to meet fellow 416ers in Coachella (this was our 4th year in a row.
Our camping lot is all filled with a giant tent and SUV. From what I can see, you're not allowed to sleep in the parking lots.