I agree with the others, don't split them to death...
Have you contemplated using some different colors or geometrics, even if just the landing board, or on the hive lid, to help the bees figure out which hive they belong to? I'd hate to bee a bee and fly into a yard of 20 nearly identical hives and try to remember which door I am supposed to use. I use the Rustoleum "Painters Touch" (made for wood, plastic, and metal) spray paint to add color easily, and quickly, over my main base coats of paint/primer. Just a thought!
Good luck! Go for strong hives, not more numbers. My two cents. Good luck! :applause: