So after sleeping on my swatches (not literally, of course) I decided to knit my scarf "the right way" and alternate the two skeins of yarn.
A while back I bought Knitting With Hand-Dyed Yarns, not because I wanted to knit a specific project, but because I thought it would be good inspiration. It's paid off. There is a whole section on broken garter stitch. (Hence the working title "Broken Scarf."
Meanwhile, tomorrow I'm determined to block Strangling Vine tomorrow for the "Finishing on the Firsts" Ravelry group. Hopefully we'll swap one scarf for another.