I second Tom's comment on snowshoe as a replacement for CDC. I've got
a bunch of CDC in my tying area that has sat unused for over 5
years.
Secondarily, I now use it for almost all of my winging material. If a
fly requires a wing and it needs to float, I just use CDC in one of
two variations. I either put it in as an up wing or lay it flat
across the hook for a variation (rarely use this) of a caddis wing.
I've got at least 20 different colors of bunny in my tying bag. For a
traveling kit, I haul about 6 with me and very little hackle.
Frank Reid