We have been riding up there all season, and we hardly ever got to use the actual Sno Parks due to lack of snow down low. If you have a rig that can do it, go to the Clear Lake Sno Park, turn up what is normally the groomed trail and head up to the T- intersection at Schaeler (sp?) Road. Park there and unload, and then get up to the top because there is still a ton of good snow from the towers to the air strip. It can start to get thin and crusty as you head out towards the Colockum Pass Road. They stopped grooming the weekend of the 16th. But I say go for it if you can drive up the wet, muddy, icy, and bumpy road. We usually can do that until May.
Don't forget a Discover Pass if you drive up the road and park somewhere though.