After the previous questions, it turns out the answer was painfully obvious, and not one of the ones I'd thought of - crocheted edging.
Still, I tested the idea of crocheted "boning" and it actually was somewhat helpful. It was also virtually invisble on the right side. The idea is that the tightly crocheted bones act to pull the edge back toward the wrong side. I had to pull the yarn fairly tight and it probably would have worked better in a less elastic yarn (I'm using Elann Esprit, a cotton/elastic yarn). The downside is that you would probably have to crochet the bones quite close together to be enough help. The pictures below show the boning after I'd applied the crocheted edge, so you can't see how much it helped, but you can at least see what it looks like.
Right side (to the right of the crochet hook). Yeah, that's the point, there's nothing to see.
Next I tried some crocheted edgings. I did one row of single crochet and then worked back in backward single crochet, or crab stitch. The picture below shows several different variations. None of the stitches look like the illustrations in the book because the yarn is so stretchy, but a couple turned out quite nice. And I think they'll be enough, in conjunction with a few ribs, to tame the roll.
Variation 1a, on the far left side, is crab stitch worked too loosely and looking like glup
Variation 1b, to the right of that, is crab stitch worked fairly tightly; I love how it looks, but it is not very stretchy
Variation 2, as suggested by Vogue Knitting, is crab stitch, chain one, and then skip a stitch of the edging, crab stitch, etc.; this would probably look good in other yarns, but not this one
Variation 3 is crab stitch, chain one and crab stitch into the very next edging stitch; this is a little softer, stretchier and wider than plain crab stitch; it gives the piece a bit more flair at the edge
I haven't decided between variations 1b and 3.