I've been reading way too much on this case tonight, it hits too close to home both figuratively and literally, I live in Mi (a little bit further north, but close enough that this is all over the local news) and I've worked third shift and closing shift at gas stations and hotels for years. I hope they find her soon. It being a turkey hunter and a crime of opportunity just doesn't feel right to me, just my opinion. Here's why I think that, first off there have allegedly been past issues with a "creeper" hanging around other local businesses late at night, in a similar vehicle; also, it would be a huge stroke of "luck" for the abductor to just happen upon a woman working alone at closing time.
How did he know that she didn't have a coworker inside? Or someone coming to pick her up? I would almost bet money that she's seen this guy hanging around before, and though you might think that she would have mentioned it to someone I can say from my own experience that sometimes you get sick of everyone worrying about your dangerous job, so you don't tell your family and friends about every creepy guy and weirdo that bugs you because it happens more often than you really want to think about. Sometimes it's scary, sometimes you have to call the cops, but when you have kids at home and bills to pay you try to push the worries out of your mind.
As for turkey season, it doesn't actually start for most hunters until the 6th. The ones that are hunting right now are a very limited number and only in certain areas.
http://www.michigan.gov/dnr/0,1607,7-153-10363_10958_10969_12072-30342--,00.html I'm not saying it's not a possiblity, I just don't find it likely. The closest destination that looks likely to me on a map would be Mona Lake or the main highway out of town.