Snow's used to open up for season pass holders (before my first season pass), but I've AT'd it before. It faces southwest. Someone told me it was the "original" ski area at Waterville.
Anyway, glad you enjoyed your day. We usually hit the White Peaks express most of the day, but after years of skiing the same trails off it, it gets boring, so I find myself going over to Green Peak, or even laps up the tee bar to the top. I noticed there was only one trail closed that day, Tangent, my favorite. Old school, no snow making and from it you can hit Preston's Path (under the old double that hasn't run in years), or periphery.
Next year they upgrade White Peaks with a 6 pack lift, and supposedly in a few years they're supposed to expand terrain east of Green Peak and will have a gondola connecting the village to the mountain.
The one thing I don't care about for Waterville is most of the trails face northeast, so they really don't get much sun until mid/late February, but I guess that probably helps with snow retention.