Up here (on the Kenai Peninsula- my permanent home) they are pretty much homebodies in my experience. I once killed a deformed-antlered moose a half mile and 4 years later from where I'd first seen him. I also saw/followed a certain bull ("Junior") over 5 years, every year, in same location + - a half mile during hunting season. The last year he was plus or minus an inch (50") of being legal - too close to call. The next year I had enough meat and did not hunt. Never saw him again, so someone got him. Damn, I liked that bull- he'd provided me with a lot of entertainment!
I've read studies from an area in Canada where collared study animals migrate 30 miles or more, so I guess it depends on circumstances/terrain. I kinda think mountain moose probably have some vertical migration due to weather. Which, along with a couple other considerations,insects included, was the case in Canada.
My gut feeling is that your cow(s) will be in the same general location, even in mountain country, in September. Too early for rut or weather to move them, except maybe towards the end of September. Cows determine where the rut (late September thru Oct) area will be. Like human men, bulls will follow, tongues hanging out.....
So if weather doesn't force a located cow/cows to move, I'm guessing any scouted cows will be in the same general location, within a half-mile or mile. Look at the habitat for clues. I'm not that familiar with your environment at that time down there, but they are likely to be transitioning from summer forage to more woody browse perhaps. They are doing so up here.
I'm near sea-level, while moose environs down there are up higher, so perhaps it's the same general deal.
The best bait for a moose, is another moose. I've killed several bulls by watching a located cow. They are fully aware of any other moose in their area, so watch body language if you spot a bull first. And they ain't dumb, by any stretch of the imagination, despite their looks. If you see a spike or fork horn "yearling" - his mom isn't that far away, even if she has another calf.
I highly recommend that you read "Ecology and Management of North American Moose" if you can find a copy at a library or somewhere. Copies are spendy to buy - $80 or so - and I don't lend mine....
Good luck. A nice fat cow moose is mighty fine eating. Heck- that rolled bull moose rib BBQ I finished off last night was PDG. I killed him in 2010 and vac-packed him. (Lost in the freezer.....!)