First off a variable snowpack means a lot less speed. You need to go slow and scope out the best line with the best coverage. Try to keep edge pressure to a minimum do you dont just dig through the snow and slide out on the ice. Try for longer traverses and less turns. Also look for moss on the rocks. It absorbs water and then freezes so it rides a lot like ice which is still a lot easier to ride than rock.
You learn some strange tricks ridding the glades in April