Turkey's are a funny thing. Lived over in Clinton, to Potomic over to Alberton and Lolo, over the last 15 years and hadn't seen many turkey's in that many years in the area. They seem to be popping up everywhere nowadays.
Down here in the Southern Bitteroot where I live anyway they are like fly's and not really a challenge to hunt.
Your in Missoula, I would go over to the Fish and Game and talk with those folks as they have been planting them for years and could point you in the right direction.
There is a lot of block management units. I am looking at the 2003 giude and none show Turkey as a huntable species, but I bet that has changed. There are 7 or so area's between Lolo and Hamilton. The last few years I have seen Turkey's standing on Hwy 93. Some of these area's require you to draw a permit so you might want to check into that as spring is on it's way.
Thats where I would start.
Good Luck