Rental car at OSH?

[kevin]

My friend Carlo, who is coming to Oshkosh with me, would like to rent a car in OSH while we are there and drive to visit family in Milwaukee. I told him that I thought it might be very hard to find a rental car during the show. Do any of you who have attended have any thoughts on whether this is possible...any tricks, or sources?

Normally I would fly him there, and I know he would prefer that, but once I get a camp spot at OSH, I don't want to leave and lose it.

Please let me know what you think.

Thanks,

Kevin