Go to Grumpy's (aka South First Surplus)...pretty good selection at decent prices. I buy basically all of my stuff there if I don't get a chance to go to Sportsman's in Tri-Cities.

If you're familiar with Yakima/Union Gap, it's just north of the Valley Mall Shopping Center. It's a bright yellow warehouse right between at McDonald's and Hertz Car Rental.

If you need more info/directions, let me know and I'd be glad to help.