If your group is large enough you might consider using wands, you can make them from small diameter bamboo, cut a slit in the top and insert some bright surveyors tape, about 4 feet in length or you can buy bamboo or fiberglass ones. Anytime you leave basecamp you mark out the return path with them. If you are on a glacier mark your safe zone around your basecamp with wands or ski poles laced with bright cordelette, you don't want to disappear on a midnight tinkle break.
If you are prepared sometimes the best one can do is sit it out, but paying real good attention to the lay of the terrain before the whiteout sets in can give you options to discuss before you commit to a direction... i.e. was there a steep headwall on your right or did you ascend above a creek drainage.
These can be quite a frightening experience for anyone, seasoned or newbie.
Oh yeah, a couple of whistles can keep a group in touch as they fan out looking for landmarks; use a prearranged system of whistles to communicate.