I think montana appeals to so many WA hunters because, although montana does not produce a lot of b&c bucks, it does produce a lot of 20" type 4 pts, and that is more deer than most have ever shot in their life in WA. And, it isn't unusual to see 10 or 15 bucks a day in montana, it might take 5 years to see that many bucks in WA on public land, let alone anything approaching a 20" 4pt.
I have hunted broadus and the breaks; I will take the breaks anytime. Lots of public ground, and there are vast areas in it that don't have a road going down every ridge. When we were in broadus 2001 the Eastman guys were there; the Primos guys were there. It was crazy..........they just hunted a little ways out of town along the river, we would see their PU parked every day.
Hunters in other western states (ID, Wy, Uah) have grown up in states that can and do produce trophy mule deer, so I think a lot of them tend to stay home because they have good potential in their own states.
A typical day in montana might be to see 25 or 30 deer, with 10 or so being bucks, usually in the rut. Usually one or two of these will be a small 4 pt. That is pure heaven to the avg WA hunter. Especially, when they see that first 20 incher skylining himself....