Hi,
Just a short 5 - 10 min. walk from the Dolphin, and you'll be at the Boardwalk.
I think the easiest way to walk to the mini golf is from the front of the Swan, then cross the street. Not far at all.
Disney Friendship Boats go to Epcot and MGM (stops at yacht/beach club & boardwalk), or you can walk to same.
Disney busses go to MK, AK, DTD & water parks.
It's a great resort!
-Mark