the newer parks have easy parking near the entrance. magic kingdom you park miles away and after you get the car parked, you wait for a ferry or ride the train, on busy days both can take quite a while.
the magic kingdom section is getting a little dated, good for the littlest ones. i enjoyed epcot, ride the scandanavian boat ride, the mexico ride was alright, and good fireworks. animal kingdom has a zoo feel. mgm, ride the tower of terror. the water park should be a lot of fun in the june heat
if you get tired of disney, universal has some good rides and attractions, and is usually a pretty good deal.