One note, for all this time in Frontierland / Adventureland, you have not accounted for the Jungle Cruise. I would think a family of your mix would want to hit this for sure! I would consider dropping that FP+ for Buzz and maybe making it a JC for 11-12'ish instead. Buzz you can more likely find as a late 4th or 5th FP+. Also if you can, take that SDMT FP+ for as early in the day as you can get it. The sooner you use it, the sooner you can try for a 4th. Maybe shoot for 2:30 and do it before the parade, then come out and head for a parade spot -- your party can hold your parade spot while you go try the kiosks. Then by the time the parade is done you'll have your 4th FP time will bit e up and you can use on say Buzz. Then shoot for that 5th in Fantasyland, which might be later, which is okay... maybe you'll get a 6 or 7pm for several choices of rides in FL.