I went to a wedding in Stanley a few years ago. It was on Redfish Lake. Absolutely pristine alpine lake with the Sawtooth Range peaks just plunging into it. Hot springs all over the place and a great river for white water rafting.
The sign said population 250 or something. I asked someone how it was possible that only 250 people live in this summer wonderland. They said it regularly gets to 50 below zero in winter.
Totally different microclimate than Sun Valley, which is like an hour away.