Weyco wants $150.00 to hunt their St. Helens Tree farm. Good luck getting into birds there as easily as you can on a release site.
E Washington is great, but it takes time and money to go hunting there if you live west of the mountains and for a lot of guys that's a once or twice a season trip. That's not acceptable if you have a bird dog or two. $90.00 is a small price to pay to get your dog(s) into some birds over and above what you can find and/or squeeze in with wild birds.
Or put another way, you'll likely pay as much in gas just to go across the mountains and back on one trip as you will for a release site permit. It's a steal and the release sites serve a purpose for many, one that grouse, even if their habitat was better managed, can't replace here.