I crocheted this scarf using mainly slip stitches where I took only the backof the previous row on the hook. Always crocheted from the same side (not turning the work). I wanted to make the scarf as varied as possible. Sometimes there is one yarn on the hook, other times 2 or 3.
A few times I used a single strand of weaving linen and single crochet. That shows as a sparser area in the scarf.
Photo of the back side of work - not so different that it matters if the scraf turns that way when worn: