I'm not familiar with any Montana outfitters but the trick is to do your research. Ask the outfitter for some client contact numbers and give them a call. If they won't give you any past client info something is fishy and you might want to look elsewhere.
Look into Skyline Guide Service out of Cooke City Montana. My wife and I know them (Liz and Victor Jackson) quite well, and they are great people. I recommended them to a few friends from NY and they went there 2 years ago and had a successful hunt. They hunt the early bugle season on the fringe of Yellowstone Park.
When placing a trail camera don't just look for a well used trail. What you want to do is look for a freshly used trail off by itself that goes from a north facing ridge, thick forest, brushy knob or some other similar bedding area to a food source. Don't forget water sources. Especially in the summer months the deer need water so look for a good trail going down too a creek surrounded by thick cover and place the camera 100 yards up from the water source.
Scent control is very important...