Coming from tennis to pickleball about 20 months ago I wanted a miniature tennis bag for carrying all my pickleball gear so I went with the Wilson Rak Pak (it said tennis bag on the heading but it isn't long enough for a tennis bag; to be honest I think it's meant for racquetball) - it doesn't get great reviews but it's been perfect for me and has held up incredibly well (still looks new). Three compartments and a pouch on the outside...holds everything I need including shoes, towels, food, sunglasses, hats, wristbands, extra overgrip, etc.
I recently went to a Gearbox paddle so for my birthday my wife is getting me a Gearbox bag - I tried out all of their bags, including the ones that look like a smaller tennis bag, and decided I like the backpack style better - It's the perfect size, has a separate shoe compartment, and has so many useful pockets:
Gearbox Backpack Blue
But again, depending on what all you're carrying it may be too large and the other bags mentioned above may better fit your needs.
TripleB