when are you going? We will be there Jan 29-5th. where depends on the conditions of course but the standards; Storm peak south over to Sundown express is Shadows, closets, going over again towards Sunshine is the O'clock trees- you will need a local or someone familiar with the mountain to show you where to enter but it inbetween the 1,2 and 3o'clock runs, Priest creek trees, Morning side is good but it's too short in general. What was known as Pioneer ridge has a ton of stuff going over into Christmas tree bowls and beyond. Pony express has great stuff too. Off the side/back of Sunshine is Wally world, a small but really nice section of sidecountry accessed off the side of the skiers far left runs you can follow down and back onto sundshine area or over skiers left again and into Morningside. Great trees in there. Stormpeak North has great access into Triangle 3 area into the trees and down along the storm peak lift. Ski down and cut under the bar-ue lift towards Buddys run and down throught th trees or come straight off the face of Triangle3 and ski down to 4 points hut. work your way off the top of Morningside towards the front side of the mountain and down The Ridge and crow track and straight down, some good steeper stuff mixed in with cool features and trees, below the cat track that cuts across, you can ski straight down into great trees again and break right and try to get into the meadows; ski down and over to the left back onto buddys and out. OR whe you get to the cat track, skii right about 100yds and just before the track bends, jump into the trees, this will take you into the meadows, its a mellow but really beautiful area that typically hold for days as most don't know where to enter.
In general, there is a ton of stuff and more than I listed here. If you are into trees, there's more than enough for a week let alone 2 days. When it gets closer, take a look at the conditions. Some of the folks here that live there can give you better more precise info on what's skiing best. I have found that locals are very helpful and are willing to show "us tourist gapers" some of the best places to go. It's a very friendly place.
Instructors? Snowboard or ski? Snowboard, you can't do any better than Abby Slingsby. She's incredible and has a real talent for teaching kids (all ages) If you can swing it, i would get the kids with her for a couple days. If not, Steamboat has a great program for kids. Good ratio of intructors to kids.
One thing you need to understand and not underestimate is the tree-well danger there. don't ski the evergreens alone especially if the snowfall has been heavy.