Cape May Cafe/Boardwalk- I'm not sure that you can go straight there by buses. You'll still have to take a bus to a park, then switch busses. Are you going for dinner? If so, you might just want to make this your Epcot or DHS day. You can get to the Beach Club by boat from either (or walking.) If its breakfast, I suggest a taxi.
Ohana and Kona and 1900 Park Fare- I'd say the best best is to take the MK launch from WL to MK, then the launch to GF or Poly. You could go to Contemporary, then take the monorail, but I think that would take longer actually. Two reasons- the launch to the CR also goes to FW sometimes (depending on the time of day) so you might make more stops. Also, when you get to CR, you'll have to walk from the boat dock to the monorail. Not a super long walk, but longer than the walk at MK from one resort launch to another. If you have time, its probably a little more interesting to do the monorail.