Ahoy there Victoria, I'd like to wish you a very warm Canadian welcome to planDisney!
As a fellow Ontarian, I imagine that you might also be spending our currently snowy season by planning ahead and dreaming of the sunny Floridian skies after sailing in hopefully warmer weather. I was once in the same boat (pardon the pun) with just enough time between the end of the
cruise voyage and my flight to squeeze in an impromptu Walt Disney World Resort visit.
You can absolutely take advantage of the
Locker Rentals located just adjacent to the park entrances. On our last visit they had several sizes available, with some larger spaces available at
EPCOT and
Magic Kingdom Park that appeared to accommodate other folks with carry-on luggage. Keep in mind that these are available on a first-come, first-served basis and are priced per day based on size!
In my personal experience, the friendly
Bell Services Cast Members have also been very helpful in storing luggage between stays. In the past, all they asked for was my name and presented me with a tag for retrieval later on. This has been extra helpful on days when I have a very late flight scheduled and would rather be able to spend my day unencumbered by my bags. While this may be subject to change and availability, it is also a complimentary service where gratuities are not included - so I always recommend being sure to generously tip the friendly Cast Members for always keeping our luggage safe.
Do be careful to save some room in your carry-on;
the multitude of shopping options available at the Theme Parks have a dangerous tendency of catching one's eye - you just might end up flying back to Canada with much more than you anticipated!
As I always say: May all your voyages be exciting and merry, so long as you don't have a lot to carry!
Wishing you a wonderful sailing on your future adventures!
Prince