Stayed at both FS and Camelback, and kmklint raises good points. FS is well outside Scottsdale, which I found very enjoyable as I just wanted to relax. We had a very nice time.

Camelback is much more in the thick of things, though is quite calm and tranquil within the property. I believe we had a Spa Suite, which was lovely.

My preference might SLIGHTLY lie with the FS, but just because I like being "away from it all", and found the stargazing and peacefulness more to my liking.

That being said, I thoroughly enjoyed Sanctuary for my birthday weekend when there.