Hiya, Tom! Welcome to
planDisney!
If we don't talk about Annual Passes (no, no, no - now I'll have the Encanto soundtrack stuck in my head all day), there are a couple of types of
Walt Disney World theme
park tickets that you can purchase. The first type is a one-day, one-park pass. This type of ticket allows you to make a reservation at one theme park, and spend the day there without visiting another park. You can leave that park and go back to that park, but you cannot visit another of the theme parks.
Another way you can do your ticket is to add the
park hopper option. This option allows you to book a
theme park reservation for the first park you want to visit, and then after 2 PM, you can hop over to another park - like
EPCOT for a
dining reservation. Without the park hopper option, Tom, you can't leave one park to go to EPCOT for a dinner reservation.
If you do book a park hopper ticket, chances are, you won't be facing an issue with capacity. Walt Disney World works in phases when it comes to closing due to capacity, and except during weeks like Christmas and sometimes Easter, you don't typically see the parks completely closed because they are full. If you do face this situation, your best bet is to plead your case with a
Cast Member over the phone. There is sometimes some wiggle room with regard to the cancellation fee.
I hope you have a wonderful visit, Tom!
Anna