Agree with all the recommendations, We went last year (oops cant say that any more, it was the year before last) in September due to the recommendation of less crowds. It was amazing, we often just walked on rides or waited about 5 - 10 minutes the only exception was toy story mania. We got an amazing price on our
Disney cruise for this year

(it sounds good to be able to say that) for September and I am just keeping my fingers crossed that we do not have to face any hurricanes. Another reason why I like that time of year is because the parks are decorated for Halloween, as its not a big deal here I thought it would be great to have the kids experience trick or treating at
MNSSHP, it was so different being at magic kingdom during it and I cant wait to do it again as we missed so much. I think December would be an amazing time as well, with the Christmas lights, though the crowds are meant to be heavier.
I hate the heat but seemed to cope ok with the September temps. Be prepared for extreme air conditioning, every time we walked into a building we would get goosebumps due to how cold the temp was, but it was still a relief to walk in there away from the heat.
Along time ago I went to WDW in April which is meant to be busy, I found it ok, but then I was child free and it was just me and a friend, so waiting in lines was not such a bother as we were always amazed at things that were going on while in those lines.
My only advice is Research, research as much as you can, crowd levels, average temps, where you want to eat, what you want to see, what rides you want to do the most. Accommodation offsite vs onsite. This will help you in planning the length of your trip and what budget you are looking at. Be warned though you will never do everything or see everything in one holiday, but if you prioritise you will be able to do the ones you feel are the best or most anticipated. I love the planning process and feel its all part of the holiday.
Try not to get to overwhelmed with it all. Enjoy, happy researching and I hope you are able to have a holiday of a lifetime with lots of great memories.
