and to further my answer to the op, if you head out to horsefly with a sled there's some definite potential for sled accessed skiing on the west side of the cariboo mountains. it'll be a long sled ride out to get to the mountains though, so not sure how viable it really is.
if you head the other way into the chilcotin ranges and bella colla area there's probably some easier accessed peaks, but almost all of it will be sled access.