Hey guys!
I went in may this past year and are planning a trip on the same dates for next year. I'll try to answer some of your questions. Crowds: If you go in early may there crowds are very minimal to average, we went in the early part of may and the longest wait time was probably around 40 mins for the whole week. Mid may- June is fairly crowded not matter when you are there. Especally when schools start getting out. Aslo, something to remember, if you go in early June be prepared for huge crowds from Gay day. The only park that is effected by Star Wars weekends is MGM.
I've been to WDW 5 times and still havn't come close to doing everything. Since you are going to be there during the summer you might want to consider going to a water park, if you havn't already. Try some nice restaraunts, there are many to choose from. You could do a behind the scenes tour at one of the theme parks. If you really want to splurge you could go on a fireworks cruise on bay lake and watch Wishes or the do the Illuminations cruise. Just a few options to think about.