Knitting Pattern question...?

Knitting with Suede is a lot like knitting with cotton, not much give in the yarn, so the bigger the needle that reasonable, probably the better for a scarf. And, yes, you'll probably use two , if not more for this one. You might consider basket weave stitch for it, rather than an occasional purl row, or make it ribbed, with a k3, p3 pattern that would be reversible.