The road to Paradise gets plowed, however, they can still require chains and will turn you around if you don't have them.
There is three feet of snow at Paradise right now. Snow cover on the upper part of the mountain on the south side is typically thin in December due to the fact that the prevailing winds strip the snow off that side. Crevasses can be very thinly covered. Additionally, sastrugi can make crevasses very difficult to detect.
Hope that helps