We used www.vrbo.com
to find a townhome in Driggs, ID. We chose Driggs because of its close proximity to both Jackson (45 minutes) and Targhee (<15 minutes). By staying in Driggs, we were able to avoid the two things that make Jackson unattractive: large crowds and high hotel prices.
We were blown away by how deluxe the townhome was. The place was brand new and loaded with extras: stainless steel appliances, convection oven, granite counters, tile floor, two fireplaces, big screen TV, propane grill, leather furniture, and (most importantly) peace and quiet.