Before you board to go to MK... the only cost to you would be parking if you didn't park at a resort or other park... you could take a bus or monorail from any of the other parks and walk over to the Ferry Boat dock and look towards the castle. Although even if you've been to DL, if you haven't been to MK I would say go... I've heard there are many differences and the new Phillarmagic is great!