Angel Fire is a long way from nothing so be prepared. Next to nothing there but a couple of little restaurants. There's a ski lift in winter but....not in summer. Nearest real grocery store is....I have no idea. You could drive the enchanted circle though from Angel Fire to Eagles Nest then Red River, Taos and back - then just sit around the rest of the time you're there....be sure and take everything you need....
As far as Ruidoso goes it will be warm this time of year in this heat wave. I think I looked the other day and it was pushing 90. The elevation is less than 7k'.