Planning the kids' (ages 4 and 6) first trip to WDW and are finalizing are dates. Was all set to go 4/29 to 5/4 when I discovered there were HS grad nights on the 30th, 1st and 2nd. Any idea how this would impact us in terms of NOISE and crowds? DOn't really know what these nights entail? We can go a couple of weeks later - is that a better idea? Anyway, we're spending a majority of our time at MK, Epcot and AK and are staying at either the Poly or WL. Thanks for any advice/expertise!