Quite a few places in Washington state would fit the bill. Winthrop/Mazama, Leavenworth, Wenatchee, Cle Elum, Darrington, Snohomish, Snoqualmie Pass (lots of ski cabins), North Bend, Issaquah (if you prefer being closer to stores, etc -- Costco flagship store is there), Enumclaw, Port Angeles, Walla Walla all come to mind. July-mid-September the best time locally weatherwise. We've had a fairly rainy/cool spring and early summer so forest fire risk is lower -- good year to check out E. Washington. You could head further south to drier/warmer places as the weather cools.