I went there a couple a years ago with my father, It was a great experience, even though Iowa lost. Michigan has a beautiful campus, so i would suggest talking a walk around that (plus most of the campus is very close to the stadium, at least a lot closer than Kinnick). That being said, Our experience was pretty comparable to most away games I have experienced in the big ten. For the most part the fans were great, the were a couple of annoying drunk college kids; they kept asking who randy reiner was for some reason? But as we walked around we were invited to tailgate with some mich fans, and we were very grateful. Once we got into the stadium the people we sat next to were awesome, they repeatedly told us how much respect they had for Iowa Football and how Iowa always played them tough and made them EARN their victories. As far as parking goes we didn't really know what we were dong so we paid $25 and parked at a reasonably close house. We arrived at 9am for a 230pm game. I don't recall if they have a lot of food stands outside the stadium (like Iowa) I remember we ate at the tailgate we were invited to. I would very much recommend everyone takes this trip at least once.
The one thing that surprised me was that for all of the lore that goes along with "the big house" I was surprised at how plain it was. I expected a massive amount of awe for a stadium that big, but it just wasnt there. At least for me nothng compared to the horse shoe or kinnick.