I'm about 5 Miles from MIS in Michigan which puts me about 4 hrs north of Indy. I havn't been to Indy in years since I took my mother to an MG event where she could show off her TD she bought when she was 16. It looked like a fun place to be. Probably more so w/o my mother. At that event the infield was open to parking and camping and I even think there was a golf course there if I remember correctly.
I was trying to get a couple buddies to ride to Mid-Ohio in July for their Honda Super Cycle Weekend ( http://www.midohio.com/Schedule/Honda-Super-Cycle-Weekend-presented-by-Dunlop-Tire ) They're riding big CBR's which would travel better on the 2 1/2 hr ride than my 28. I've been to Mid Ohio for vintage racing events and it's a very nice track. Never seen bikes race on it though. Went there last year for the 50th anniversary of the AH Sprite. I have a MKII GP Sprite in a constant of resurection. I was a fun time.
I'm going to take a look at the Indy event. Might be fun. Definately a trailer trip for me though.

Dan