Which boat are you talking about?There is the ferry from MK to the TTC and then either walk to the Poly or take the resort monorail to the Poly,GF or Contemporary to then get a bus to DTD, OR are you talking about the boats that go to DTD which only come from Port Orleans or Saratoga Springs,If you wanted to you could take a bus to either of these resorts from MK to then take a boat to DTD,but none of these are fast options.The absolute fastest route is to walk over to the Contemporary(5-10 minute walk) and just grab the bus to DTD there.