I couldn't find it via a quick AW search, but I remember an article in the last couple years about snowmobiling gear into boundary creek, then AT skiing via raft support. More runs were done up higher, but they were hiking for turns even down a bit lower. I think they did it in March or april. Might have been in Backcountry Magazine, not AW.
If I wanted to combine skiing with an early MFS trip, the skiing would be way above Stanley
(seven two 0)-298-2242