Hi Lisa,
Fantasmic is now only performed on select evenings which makes it wildly popular on nights it is offered. There is limited handicapped seating available on the top rows of the theater. They usually allow one person to sit with disabled guests & the remainder of your party will be directed to companion seating nearby (if available). People start lining up to get into the theater more than 90 minutes prior to show time.
The
Fantasmic Dinner Package includes dinner at one of three restaurants: The Hollywood Brown Derby, Mama Melrose's Italian Restaurant or Hollywood & Vine AND a seat within a reserved section of the Fantasmic Theater. The section is reserved but the seats within the section are not. The recommended arrival time with the dinner package is 30 - 45 minutes prior to show time. This is a significant difference especially for people unable to stand for long periods of time.
I would opt for the Fantasmic dinner package & book it as soon as your 180 day window to book Advanced Dining Reservations opens. I would also arrive a little earlier than the recommended arrival time of 30 - 45 minutes so that you are able to get a seat close to the top of the theater in the reserved section. Usually the on-line calendars are posted 5 or 6 months in advance, but if the times are not posted when you call to book the Fantasmic Dinner Package, the Cast Member assisting you with your reservations should be able to assist you with times. Call 407-WDW-DINE to book your reservations as soon as your 180 day window opens.
Keep in mind that performance times may change without notice or cancelled due to inclement weather. If Fantasmic is performed more than once on the evening you select, the dinner package is only offered for the 1st performance. Wishing you many magical memories :-)