In reply to kevin stephens: You can use anything as a dead man. Shovel is fine in most situations, but for crevasse rescue I'd be concerned either about the cord being cut by the shovel at the holes, or if you construct a heavy swaged wire harness, then could the thin aluminium shovel fail? I doubt it would, but the forces involved in hauling up a 80kg person + system friction are phenomenal. Well worth it as a backup anchor tho.
Skis, axe, ski poles, tent poles etc would be my go to option. Pickets are great too. But, be careful of the sharp ski edges on your sling.
Re falling in yourself, once the anchor is set, you would naturally be attached to said anchor while setting up the rescue system i'd imagine?