In Montana, I assume you're hunting Merriam's. To me, they are less a woods bird and more a field bird in the first place than, say, Easterns. I'd find their cottonwood roost and set up in a field adjacent the roost site. In my experience, the turkeys will stay clear of the woods as much as they can, and will go to the fields. If you already have scouted and discovered a field they frequent and know their typical entry into that field, set up there.

I'd bring my Ameristep Doghouse and set that up. Stay dry, birds are unafraid of it. BUT, I'd get in the field, not in the woods adjacent, as I've seen birds parade by 65 yards out in the field.