We're going down to WDW for April school vacaton and have been watching the fares since last May. Back then the fares started at around $350 p/p r/t, now they're around $450 p/p r/t.
We drove down from New England a couple of years ago and it wasn't that bad a ride. To avod the hasstle of the airport and for the price of the airfare, transfers, parking and car rental it looks like we're driving down again this year.
Good Luck All,
Joe