For Robot Rodeo...overnight parking/crashing?

[Billfred]

Alright, so certain people (cough)franchesca(cough) have stuck the notion of making the trek to Robot Rodeo in my head. The problem is, it's just over seven hours from here to there, which means I'm likely sleeping in my car on Friday or Saturday night. (I mean, I could get a hotel room, but that brings the cost of this excursion beyond what I'd prefer.)

So, can someone with more experience than I in this subject point me to a place I can park my car and sleep at for one of those nights?

(And don't let this cause you to hide away from me at RR if I make it--I'm not going to work up a funk driving down the road.)

Thanks!