in the gravity, grace, and skidding thread i listed folks that i seek out at WP for help with my skiing. in the past at some point passwagon offers a very good deal with a four pack of group lessons for $99.00
the individuals i listed all work out of the private lesson desk and hence don't do group lessons. the one exception is dave taylor who imho is the very best bump skier that i know and a very good teacher. he is a new zealand demo team member. he works adult groups unless out of groups he has a request private lesson. he developes a lot of private business and on average only shows up a groups once a week or so.
at the upper levels in groups all the instructors are full certs and do a good job. if you take a "bumps/steeps/powder" lesson in the afternoon mid week the group size will typically be very small. on average three or four folks.
WP also has a variety of special programs like "bump jam" which is a bumps only clinic held a half dozen or so saturdays throughout the season. it is very popular and the resort puts their best instructors in the program. the SSD does a really good three day bump camp in which he hand picks a half dozen top instructors to help in his camp. Bob Barnes (WP Bob not the epicski Bob Barnes from Keystone) is a former national demo team member, a great teacher, and a really great guy. as a bonus he is one of the funniest people that i have ever met. if he can't fix your skiing no one can.