Have a great time.
We've returned home this week and the weather was very hot there so make sure you have sun cream and sun hats with you (but also rain coats for unexpected showers)
The parks are very busy at the moment so definitely try to make use of the Extra Magic Hours. You should be able to get into the park at 8.00 (Guests not in Dis hotels are only in at 10.00) where you can ride a selection of rides early.
We found this invaluable. We got to the park for 8.00 and managed to ride PeterPan as a walk on ride (on one morning 4 times in a row), Dumbo, Teacups, Carrousel, Pinochio, Buzz Lightyear all as walk ons.
By 9.00 it had started getting busier but was still pleasant but by 10.00.......
We did all this before breakfast - You could then return to your hotel for bfast or try to get a Good Morning Fantasyland Bfast for 9.30 ish (this is available at no extra charge to eat bfast in the park) or you could opt for very early breakfast and then head for the parks.
Above all ENJOY