Nachos and skiingI was there in March of 2000. I understand there has been a fair amount of development at the base since then.
Don't miss the nachos at the Hellroaring Saloon at the base-- literally the best nachos I have had in my life-- I'm sure the ambiance of sitting on the deck apres-ski on a bluebird day also enhanced the taste.
Big Mountain is unusual in that the front side faces south. Going in March, you may find it getting a little sticky on warmer days in the afternoon with the southern sun exposure. In that case, just ski the lift on the back (North) side. Relative to Colorado, the altitude is fairly low-- summit 7,000 ft-- so that's good for anyone in your group who might have altitude issues.
For intermediates and even beginners (beyond first-timer level), Hellfire in Hellroaring Basin is a lovely run. Very long-- more than 3 miles-- kind of meandering, but thankfully not flat catwalk for the most part-- with a couple of trees sprinkled in-- just isolated and very pretty over there.
For challenge, Bighorn on the North Side is probably the steepest "run" there. There is also some challenging stuff in the east rim and Haskell Slide areas on the front side. There aren't real defined "runs" over there. When I was there, it wasn't all that well marked with signs, you just kind of pick your way through the trees and rock outcroppings. It's fun though, a very natural-- almost backcountry-- experience.
Ski school can be great. It's so uncrowded, that my wife and her friend ended up with just the two of them in a "group" lesson.
The "snow ghosts" are cool. The trees really cake with snow there. Just remember they're not as soft as they look.
You hear people say it's often foggy there. At least the week I was there I didn't find it to be a big issue. I remember one day that was snowing and
not-so-good visibility but the mountain is big, thus the name, and was able to find tree lined runs where you could see much better.
Hope those are some helpful tidbits. You'll enjoy it. It's a cool place.