If you are flexible with your travel dates, I strongly recommend mid October. Weather is great and crowds are down. No way you could get me to go spring break through the end of summer. Stayed at Polynesian last year, Contemp year before. They are great if you have small children and will spend most of your time at Magic Kingdom...getting to other parks isnt difficult either. The monorail makes the price increase worth it...kids get tired, we get to room in twenty minutes, rest a few hours..then back at park in twenty minutes.No waiting for a bus for half an hour, then travel to four other resorts before finally arriving at MK90 minutes later. Also, strongly suggest a meal plan..I've done the math and you literally save a couple hundred bucks, strongly suggest "park hopper" passes too...come and go as you please, any park, anytime.
We did Chef Mickey...simply so we could meet all the characters and get photos at one place...didnt have to wander all over the park and wait in line to meet them individually. Definitely use fastpass, and get a smart phone app to check wait times. Again, I think the most important decision you will make isthe time of year you visit.Disney is expensive, but I think you get more bang for your buck thanmany other vacation packages....they usually have their **** together in a major way.
PS - "Soaring" at Epcot is a must ride...get there before the park opens and fastpass it...I think it's the most popular ride at Disney right now. </p>