Okay, I'm pretty much done for the moment.  I've got two models completed.  The single tail, with its more streamlined front end, is the easiest one to use with minimal head morphing.  The twin tail (the one on the top in the attached image) needs some signficant head morphing to look like it belongs but, on the other hand, the two tails are already there in place.  As I mentioned before the single tail is cylindrically UV mapped, so it's texture-ready.  The twin I haven't run through a mapper yet but it shouldn't be too hard.

I have to say this little project was fun: I finally used the Setup room and used software that I've had hanging around for (literally) years but never really bothered with until now.