Debs Hill
What about Mother's Day. That's in May, so I agree with Eva. We did almost the same a couple of years ago, a few days at WDW and few others at VB to spend Mothers Days weekend at the beach. The crows at WDW were light (well before the rush of Memorial Day) and VB was already warmer (the water was a bit on the cool side). We live in South Florida and is the best time of the year weather wise (many open air events are held between Eastern and the week before Memorial Day: The Corporate Run, MS Walk, Cycling Events, Coconut Grove Arts Festival, etc). Around June, school is out and WDW gets crowder. If you go beyond June, you will have the mandatory summer afternoons showers usually with lighting strikes that require all outsides pool activies (and the pool itself) at Vero Beach cancelled and closed. In my opinion without the spools (and the beach) the VB is just another resort.