Well, since my family's dates are overlapping yours, I think you will find the crowd-- at least our contribution to it-- unruly, loud, impatient, and hard-drinking.
Just kidding. I noticed someone linked to the crowd calendar, so that's good. There is a Run Disney event on May 3, and I don't know how much impact that will have, but my daughter and I have visited the 2nd week of May for the past two years (Mother's Day) and found the crowds moderate and manageable. All the usual suggestions apply. Have fun!