Wow, now that the May hours are out, this thread did take off...
Okay, When I heard that EPCOT was closing early on Thur.5th, along with the big celebration kick-off, that made my mind up right there. May 5th at the Magic Kingdom will be worse than a madhouse!! (this is our once in a lifetime big trip to take DS to MK... I want it be magical, not awful....)
I want back-to-back days at MK too...
So, We will go on Tues.3rd... This should be a slower less crowded day... We will take advantage of a good touring plan to enjoy all the most crowded rides and attractions without waiting.. ( I hope!!!

) We will catch the Dream Come True parade (I want DS to see that one...) followed by PS for an early supper with no waiting.
Then, back to MK on Wed. the 4th. This looks like it will be the usual EMH night... But, hopefully we can avoid that becoming a problem. We will take a much slower pace. No fighting the lines and crowds for things we took advantage of the day before. We plan on staking out an excellent spot for the Cinderellabration, followed by PS for lunch at the Castle.
I do want to end our trip to MK with Wishes... so we will have to grin and bear the crowds for that. But what a great Finale! I am just not so sure that Spectro will be worth facing the hoards and hoards of people that will be there on the 5th. And, my son would never know the difference. Wishes will be enough for him!!!! Both in one night might be too much anyhow.
So, I hope I have FINALLY derived the perfect plan!
Can't wait!!!