First of all, hello. Lakewood, CO kid here.
For trees, I prefer Winter Park of the 3 places you mentioned. Plus, if you're feeling plucky, you can go up Berthoud Pass and hike some sick trees on the east side of the pass, which is far less avalanche prone, but be sure to check conditions and be smart.
Steamboat will be far less crowded than the other two, but much more expensive unless you look around for some package deals.
Last edited by Crescent Seven; 12-07-2007 at 10:40 PM.