Thinking about this craft fair and the one I went to a few years ago, I just know I'm gonna be left with a ton of stuff that doesn't sell. I'm under the impression that such is the situation for any retail endeavor, especially craft fairs in small locales.
Like, I really shouldn't let it discourage me from making whatever I want. But I still feel the (self-imposed) pressure to make appealing things.
On the brighter side, as I browsed patterns, I went searching for projects using the Caron x Pantone palette yarns. @sycamore gifted me two bundles in a cream-and-blues colorway several years ago. They're individual bundles of each color, rather than one continuous strand. How lucky am I, there happened to be a project using my exact colors AND something I'd wear/use.
Bubble Stitch beanie hat by Studio Knits
Because I have two bundles, I can make one to sell. Or I may send it back to sycamore. She's sent me quite a bit of yarn and goodies over the years. (My pumpkin-knitting spree was spurred by all the orange yarn she sent me years ago.)
Edited to add: Oops, not the exact colors! Instead, the one I have is "green meadow", which goes from a light-emerald to lighter greens and light grays. This hat on Reddit uses the right colors that I have on-hand.