A few thoughts.
Interesting choice of the two upcoming locations, as my significant other spent a few years of her childhood in Billings then her family moved to St. Paul. I've never been to either city (or either state for that matter, except for the inside of the MSP airport). I sure do hope that I can make it to at least one of them.
I don't think that the Billings Chamber jumped the gun, although I'd appreciate it if somebody in-the-know would correct me if I'm wrong. I saw the announcement on the MOA site home page at least a day before I saw somebody post it on the MOA's Facebook page.
Hot or cold...I'm one of those crazy idiots who think that it wouldn't be such a bad idea if we weren't so orthodox about always having the damn thing in July. We don't have to change it every year, just some years in order to open-up some locations that would be downright inhospitable in the summer. I think that Lima was the hottest of the four that I've been to. I lived in TexSux at the time, so when I griped about the heat people said to me, "but you're in your element, right?" Wrong. I never spent 96+ straight hours outdoors in the heat, in fact I tried to spend as much of the summertime in the aircon as possible when I lived there. But I'm not bitching; Lima was my first International Rally and despite the heat I had a real and true blast.
Two years later in West Bend I actually was cold the first night. I was expecting heat again (it had been rather hot the previous few days I'd spent seeing southern Wiscowsin) so I didn't bring more than a sleeping-pad and a Coolmax cocoon. I shivered all night and the first thing I did that first morning was ride down to the big outdoor-store I'd heard about a couple of exits to the south and bought myself a fleece lounging-pouch sort of thing (since I didn't have room to pack a full-on sleeping bag back home). It proved to be just right for the remaining nights. I look back on this with a giggle.