I think you probably could do 2 strands together. You could try a swatch with your yarn and see if you get gauge. You might also check at ravelry to see if you can find a similar pattern that would work with the yarn you have. They have more hats than Carter has pills. Oh my, I bet nobody says that anymore.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper