As someone who just got back from WDW and experienced this a couple days ago, I would say plan ahead or skip Fantasmic. I literally cried because exiting was so horrible (not to mention we had two very tired crying, screaming children). Next time we will skip this or we will drive our car/take a taxi instead of waiting in the line for the buses. People can be so rude as well. We waited so long to board the Monorail Resort Bus. Handicapped and their whole families (sometimes 6-10ppl) cut the whole line every time the buses came. It really made me upset. I understand you need help, even if I did see you walk around the quick service restaurant before Fantasmic started for at least 10mins (this really happened!!), but my overtired children need help as well and it doesn't give you a reason to cut everyone in line (especially when the line is out of the chains and past other resort lines). Don't get me wrong, if you are truly handicapped and can't exit your chair/
scooter then I understand. You can cut me in line all day long. We also had bad luck with our bus driver, who didn't seem very skilled in operating the bus. Fantasmic is great, but it's not worth going through all that again. Using a Fastpass+ is also not worth it (plenty of seating if you get there a little early). Get a taxi, take your own car, or leave the show a few seconds early to beat the flood exiting the park! If you can't do any of those 3 then don't go.