This weekend I tried to go to the Salvation Army and ARC that are supposedly in SLC. Well, as my friend had warned me (but I forgot) the Salvation Army address is not actually a thrift store, it's some sort of center for some thing (ants?). Haha, I hope some one else can enjoy that joke besides me :) Also, the ARC does not exist at that location, they must have gone out of business.
I'll keep you posted on whether those other stores actually exist when I visit them. But for now I'd recommend calling before you make the drive.