We're going 3/28-4/03 and there are quite a few conventions going on. Hours are extended but not summer peak, and hotel rates are not considered peak yet. You'll have fanatsmic playing on the weekends and fireworks nightly. Parks will be busy but not as busy as spring break pea (April 7-22)However, during 3/7-10, parks are at peak hours. You'll have fireworks and fantasmic and electric parade nightly. But the parks will be more crowded than the first dates you mentioned. We opted for going earlier cause DLH was cheaper than our previous dates of 3/15-21 where we' have stayed offsite. DH has not seen Electric Parade since he was a young boy. Since we're going again in the summer, he'll have a chance to see it then. But if this was DH is only chance to see it, we'd probably choose our latter dates.