If I were going, I would get up there as soon as possible. Probably will not get any better than it is right now.
March 13th, you are really taking a chance. I will take a guess that conditions will be icy early morning and wet, very wet by afternoon.
It definitely depends on the year. I have ski there mid March before and the conditions were decent and I have also ski at Sugar in mid Marcch and the conditions were bad. Like I said it just depends on the year. But, most years mid March is pushing it, as one poster stated above.
Anyone who has ever been anywhere else will tell you that. Your best hope is to get there when there is a significant snow in the evening and then you ski in the AM before all the powder is gone and you're back to the ice base.