I don't grow in Montana but I am familiar with growing blueberries. They do well in acidic soils so you might want to have a soil test. if you have pine trees that's a good start because both pine and blueberry like acidic soil. If you soil Ph is too high you can lower it by adding coffee grounds and or peat.
When planting new blueberries I add wood chips and coffee grounds into my soil and that seems to do the trick. Planting under or near the pine trees will have the a similar effect as the pine chips. Pine trees and blueberries both like acidic soil so if your pine trees are growing well then chances are your blueberries will do well in that same soil.
Good luck, let us know how you make out.