Hi, Kimberly! Welcome to the Disney Parks Moms Panel!
Although I am not quite able to visualize your stroller/scooter, I would have to lean toward the option of
renting a stroller from Walt Disney World Resort in order to avoid disappointment at the Disney Theme Park entrance. As per the
Restricted Personal Items Page, “Strollers larger than 36" x 52" (92 x 132 cm)” are not permitted and it seems that with this attachment, it might be larger than that. Having a 7 and an 8 year old myself, I too struggle from the reality that little legs get tired, quickly at a Disney Theme Park and our next visit, we have decided to forgo bringing our own stroller and test out a day without a stroller to see how that goes, wish us luck! There are also
Disney Featured Providers who rent strollers for your length of stay that might fit your daughter.
I hope this answers your question and that you come back to visit us real soon!
Jen