Anyhoo, here was my dilemma:
A very sorry hole right on the heel:
So I turned to the ever-trusty Youtube to watch sock darning how-to's. There are a surprising number out there, and a few different techniques for fixing those holes, and reinforcing worn spots (this is where the adage, a stitch in time saves nine, comes from).
I picked a technique which involves picking up stitches and knitting a patch right over the hole. Other techniques involve weaving a fix into the hole. Neither one seems too difficult, so I went with the one that I thought would probably look better, although I don't think the woven fix would look bad either. And anyway, who's gonna see it?
So here is my darn:
I looked and looked but couldn't find any leftover of the same yarn (I used what I had left to knit some fingerless gloves - which I LOVE because they are fuzzy and warm - and I think that used up the last of this particular yarn. I do, however, have some yarn from the same fleece, only without the added silk and nylon, so I used that to darn the hole:
It doesn't look terrible:
And it feels just fine when I put it on, so, voila! The darning was a success:
I can now wear my fuzzy, warm alpaca socks again, and just in time since it's 16 degrees F right now.
My feet will love me : )