Thanks for the replies. I may try some in stockinette stitch, even without the garter stitch border. With these, some curl may not matter. I'll just have to see.
And I actually looked through every scarf pattern on knittingpatterncentral.com (yes, it did take me awhile, but it was fun!), but I still wasn't sure which of them would work well with this type of yarn. I haven't done much with boucle in the past.
If anyone has any more suggestions, feel free to add them!