WALMART! Hooray for Walmart! They now have a gluten free section. At the Nampa, Greenhurst Walmart it is on the isle with the Asian, and Latino foods. It's small, but it's something. My Albertsons across the street also has a small Gluten Free section so if I can't find it at Walmart I go there!
They have pasta, cookies, crackers, pretzels, Oats, box mixes. They have a few of the flours like the Brown Rice Flour and Xanthan gum. Sometimes they have the Potato Starch but not always. I still get my Tapioca Starch at WINCO in the bulk section. I also get my Xanthan gum there in bulk. I think its the cheapest.
I have some friends that go to Seattle occasionally. They stock me up on Trader Joes Gluten Free Pasta!! It's the best price and I love their pasta!! So if you have a Trader Joes connection, USE IT!!