I did have to give up Tonga Toast though 
Where possible I would build in flexibility, plan your mornings and lunch time but keep the evenings fluid. While you might enjoy Fantasmic, you won’t like leaving among the masses with 3 kids and no stroller. When we went DD5 slept on my nap for the whole show. We did the Fantasmic dining package over lunch, but we used our ticket on a different night to see Fantasmic. My kids loved hanging out at the pool, and DD5 would start asking after breakfast when it was going to be pool time. After FPP date people drop some of their duplicate ADR’s, so it’s a good time to nab one.
Yes, if you ask DD what her favourite thing was she says the pool.