Old ward canyon in the snow on the lower half is not really doable. unless u want to use the winch all the time. only cuase of the wash outs it has. The upper part of the trail will have snow on it till end of april or later. The trail in complete. A full size truck or full size axle truck has no problems. I have taken ford 350's on it before with out a problem. I would wait till after the snow melts. with the mud it get funs and is VERY DOABLE.
i would take a wiinch if i were you my buddy sunk his truck in the snow a week ago had to get a snowcat up there to get it out but if there wasnt much snow i would go also