We stayed June 23-30 at Silver Lake. They do have a paid shuttle, somewhere between $10-15 each way. We drove our car to the park on all of the days, but my husband did ride the shuttle over one day and arrived at Magic Kingdom a little before 11am. It does cost to park at the parks, $14 a day, so if you don't want to deal with that, then the cab to Animal Kingdom idea is a good one. Transportation between the parks is plentiful, though at certain times you may have to wait a while.