Boy, I know what you mean about the scheduling. Every year I plan a week-long backcountry ski trip in the Sierra and I have to pick the dates in December or January. Sometimes I've had to revise where I go to suit the snow conditions - it's tougher when you're trying to do one particular route - and even tougher when it's that long. The corn window is sometimes no more than two weeks, and it moves around.
If you try to do something in winter conditions, timing is almost impossible - two weeks of good weather and decent snow conditions prior to mid-april essentially doesn't happen - the best you can do is to assume some stormy weather and deep snow slogging in your window and plan accordingly.
This year for me, it looks like plenty of snow, but I'm a little worried that there will be too much fresh stuff and consequently too much avalanche danger to be able to do what I have planned. We'll see - gotta take what the mountains are giving.