2 Years ago, myself and three friends went to Jackson Hole and took the Steep and Deep Ski Camp. It was probably the best week of skiing I've ever had. It was also what I think was a great bargain.
See this year's dates and info here: http://www.jacksonhole.com/skiing/steep_camp.html
My friends and I were able to form our own group with one additional skier, since we were all of comparable ability. Most groups had about 5 skiers to each coach, and although most of the skiers were level 9 types, there were a few groups of solid upper-Intermediates.
We skied hard from 0830-1600 hrs every day in places that we'd never have found without our guide Jimbo Collins who is a top Jackson mountain guide and heli-ski guide in Alaska, late season. They brought each group along at their own pace, but the ultimate goal was to ski Corbett's Coulior by the 4th day (the choice was ours).
They provided the gear, and we got some good basic backcountry training and had some epic backcountry skiing on 2 afternoons. We were provided with great gourmet buffet lunches and plenty of apres-ski activities including either kayaking lessons in the town indoor pool, or rock climbing lessons, parties, and clinics.
In addition to getting the best instructors, and having a private 0830 tram for 1st tracks each day, the highlight was having Rob DesLaurier and Tommy Moe make the rounds between the groups.
Rob is an amazing instructor, and Tommy was a blast to ski with. They, and the entire ski school staff made us all feel like part of their family and we all had a fantastic experience.
I'm not sure if Rob and Tommy are the guest coaches on a regular basis, you can call and ask, but I highly recommend this camp, and hope to be going back myself ASAP.