You guys are sure pessimistic. I think you'll be amazed at how quickly everything comes back, including the vegetation and the wildlife.
It will take 2 or 3 years, yes, but then that country will be full of wildlife.
They ought to make it permit only hunting for deer and elk starting next year, and leave it that way, just increase permits as deer and elk numbers increase. It could turn into some great quality hunting.
Of course the Yakama tribe would need to limit their take as well.