I went to DL last April, I made the mistake of going during the week of Easter, OMG! never, never, never again! see I had visited DL, the year before, for my birthday, it was not the week of Easter, and the weather, and the lines were most excellent. However, last year, never could get a fast pass for SM, which frankly I think might be too much ride for me anyway, I almost got sunburned waiting for the Matterhorn, and the average wait time, was @ 40 minutes to one hour, it was as if half the country decided to go to DL, those 3 days. Commando baby strollers, traversing over my toes, and old, cranky man, that was obnoxious towards me, because he was an ******, where is security when you need them, a CM, that could care less, about my unhappiness for being trapped by a parade, I am so sorry I had to go to the bathroom, I was not in there all that long, thank you, I come out, and whammo, lady you are trapped there, I hated that allot! and frankly I did not care to see these size 0 chicks up close and too personal like in my facial, that were in that parade, people, go eat a turkey leg! geese.
So in summation, April is just fine, for as long as it is not the bloody week of Easter!