I have not skied Retallack.
I have skied WildHorse. It's a fun operation, but definitely funky. When I went, Trevor was running a cat with a homemade passenger box. It had neither heat, nor windows. Dress warm, and watch the branches! I can't comment on the accommodations, since I live nearby and ski standby. I think they stay at the old hotel in Ymir.
From your description of what you want, I think you should look at Valhalla Powder Cats (www.valhallapow.com
). I've heard excellent things about their snow and terrain, although admittedly much of it was from Dave Lussier, who was (and maybe still is) one of the lead guides there. Dave is a good guy and has a full international mountain guiding certification (i.e., not just associate, and not just skiing). I haven't spoken with him in a couple of years, though, so he may have moved on.
Valhalla is combined with Snowwater Heli Skiing, and they offer combination cat skiing and heli skiing packages, if you want.
Strangely, even though the Valhalla pickup point is just a few minutes from my house, I haven't skied with them.
$$$$, don'tcha know! Anybody wanna donate so I can do a really killer trip report?