Winter gloves, long johns and jeans or equivelant should be ok for today, it's not that cold. Layers up the top, I usually do a light t-shirt, under armor shirt, a long sleeve shirt and I bring a jacket for over the top if I deside at the last minute I want it. personally I hate my upper body to be cold, but have no problem with my legs being a little chilled.

Your feet are in the snow now and then so this is usually where you wanna try to do something to keep them warm. if you've got flats, a pair of moon boots or something like that works great, otherwise just dress your feet as warm as you can and when you stop, try to lean against a tree to keep your feet out of the snow.

An a thin stocking cap under your helmet helps too.

Ride the bike you like the most, there is no salt or dirt on the trails. Cleanest ride you'll ever have. Start w about 20 pounds of pressure in the tires.