I basically ran down the list of lodging options on the Alta website and called every one of them. The lodges were filling up fast and were too expensive for me. I ended up finding a good deal at the Blackjack Condos. Website: http://www.blackjacklodge.com/
They have an online booking tool but I think it is best to call. There were some specials listed on their website like a 7 night free or free lift tickets etc. given certain requirements...but the only way I was able to actually apply them was by talking to them in person.
The two of us are staying in a studio which has a fireplace, full kitchen/bath, and murphy bed. Lodging + lift tickets (5-days) + transfer from airport came out to $2573 or $1286 per person. If we didn't have frequent flier miles for free airline tickets we would probably be staying in SLC/Sandy/Midvale.
If you have a bigger group they have bigger condos which i believe would bring the per person price down substantially.