I can't answer your questions since I don't go to that part of the state to shoot.
But whenever I am there, the wind is blowing. Strongly blowing quite often. My car was actually damaged by a wind gust once in E-burg.
So your outdoor shooting may get a bit sporty
The Selah / Yakima valley is not that far away from Ellensburg and I suggest you include that in your search for a place to shoot. The owner of Ace Arms in Selah may be able to give you recommendations, and you do need to drop in there to shop.