The aft deck fwd of the fishing area will only hold a 7' to 8' rowboat. otherwise you are looking at covering your swimgrid, either with proper davits or a Seawise or Weaver tip up system. The only way to have a real dinghy and still be able to fish from the stern is to tow. Then you are unrestricted, so might as well tow a small fishing machine.
Once you find a good towable, you won't want to go back to a liftable, as you can get 20 knots dinghy speed, so your range of exploration or fishing is expanded terrifically.