So excited for you! Those are awesome costume ideas- I can't wait to see pics!
That would have been perfect for my family- DH's nickname is Smee cuz of our last name, I love Tinkerbell (but I can't ever find a costume that's no too skimpy, and I sure can't make one:), DS1 has always been my Peter Pan, and DS2 would be a great Capt. Hook! I actually did have a Capt. Hook costume from Disney that they both wore when they were little- they're 4 years apart so we got to use it a few times.
You're gonna love F&W! Get the passport and have it stamped at each stop you make. MNSSHP is a blast too- we loved it.
We're trying the waterpark for the first time too so I'd love to hear your thoughts on that.
The weather and crowd levels should be fantastic too. Looking forward to a trip report when you return. Have a magical time!