I can see both arguments for this
-Queen Carrot is really, really, really fucking stupid and stowing away is an established Mink gag
-On the other hand, we have fuck all reason to care about Carrot and Oda did plenty of really, really, really fucking stupid things in Wano so it would fit in fine
If she’s getting brought along for another arc it has to be for the purpose of really delving in her as a character, and Oda’s so far failed miserably to do that. He had an entire a four year arc to build up a Carrot plotline and did nothing with her. If she has just fucked off to Zou well, she at least got more of a sendoff than Marco who’s just vanished. Or Hyogoro.
Even the stowawaying idea- okay, it’s an established gag, but her telling the Mink leaders she doesn’t think that’s what Pedro’s will meant and asking Luffy to keep going travelling with him until she understands would be far more compelling than “tee hee I’ve ran away! Surprise!”