Personally, I would not eat $1700 just because the conditions 3 months before I go are terrible. Snow can pile up fast and furious in the San Juans, but even if it doesn't, you can still have an enjoyable stay. I've had really fun trips spending quality time skiing with close friends and family when the conditions weren't great. March is so far away, there are no guarantees. Sure, Whistler is great now, but rain can set in between now and March. Jackson Hole can be amazingly deep and fluffy one week, and warm up and turn to mush the next. Honestly, if perfect snow conditions are an absolute necessity, planning in advance doesn't make sense. There's basically 2 options here: stick with your plans and hope for the best (and plan to make the best of it if that doesn't materialize), or cancel, burn a big pile of cash, and wait until max of 2 weeks out to make plans, when costs and availability are likely to be difficult. Just because conditions are very bad now has no bearing on what they'll be in March. It's a risk, but no more a risk than when you first made your plans. I've seen years where there was no snow in the San Juans at Christmas but positively buried in March. Again not guaranteed but possible.
Case in point: 6 months ago, my wife got a too-good-to-turn-down Groupon or something for a room in Steamboat for Christmas Weekend. Up until two weeks ago, it looked certain to be a total bust. Almost no natural cover, only a few runs open with a man-made base, and nothing in the forecast worth mentioning. One week ago it looked like there would be a dusting of snow, and an arctic cold blast with highs in the single digits. How did it turn out? I spent the last 3 days skiing boot-top powder in comfortable temperatures and getting first dibs on newly opened runs all over the mountain. The only thing that went wrong was my legs giving out mid-afternoon of day 3. You just never know.