Start out by saying...No personal experience.
From all I have read and heard the wolves in Montana, Idaho & Wyoming are having a negative impact on the elk, deer cattle & sheep populations, which is having a negative impact on not only hunting, but ranching also. If the wolves are left unchecked, I feel that there will be a definite decrease in wildlife numbers to the point where they may become endangered. I would also imagine that left unchecked, the wolves will migrate to new locations as their populations increase.
The impact is felt throughout numerous industries due to the reduction in hunters visiting these states. It affects the State Fish & Wildlife depts. by reduced income from fewer hunting licenses, it affects motels, cafes, gas stations, outfitters...etc. by having fewer visitors/hunters.
I guess in all fairness though, it does create more tourist that want to get a glimpse of a wolf, but I doubt that it offsets the loss from hunters.