We have been to Disney many times, and had been at almost every time of the year except Jan,Feb,Mar,or April. Then in March my husband had a business trip to Miami and I needed a break and decided to meet him at Disney for a couple of days-I thought, how bad could it be anyway?
BIG mistake!! MK in the middle of the week was unmanageable, rowdy teens all over the pool area at Pop, busy restaurants...If April is anything near like March I would avoid it like the plague.
BTW, we have been several times in early May, and it is a little hotter than Spring or Winter, but the crowds are very manageable, especially the first and second weeks.