My husband and I were at The Grange for last year's Michigan game and were happily surprised at the atmosphere. Having electric and water hookups is fabulous, and there is no generator noise (compared to those times you get stuck in ORV beside someone without a Honda).
The sites are absolutely huge (think 2-3 times large than ORV). Atmosphere was just like ORV, except no towering Beaver Stadium in the background, which is the only downfall. Plenty of people stayed and watched that game in the lot, although the majority took the shuttle. Seemed very well run. We're going up again this year for Michigan State and maybe another.
Also, they have daily parking for people who may want to come visit you and tailgate out there, it's like $5-$10 dollars and a very short walk to the RV's.