All good points and true. South end of Malcolm, the thing to watch for is big currents and standing waves at times -- but if you're on the outside of Donegal and it blows up NW, you can usually nip around the bottom end and fish from Donegal to Mitchell Bay. In a 17' boat, I'd actually be more concerned about getting caught by NW over at Bere Pt and having to come back around the top end of Malcolm -- it can go from calm to 3-4-5' breaking crap in half an hour. So if you go that far from McNeill, keep a good eye on the weather and be ready to bolt for the inside of Malcolm.
The Blackfish Sound side of the Plumpers and Hanson is fairly protected and fishy - and its a short run to Telegraph Cove and the Killer Whale Cafe - just watch the area between Hanson and Telegraph for some nasty standing wave patches on the wrong tide/wind combinations - changing where you cross makes a huge difference, as my wife and I proved a few times in an open 16' boat!
Its a great area, and we've loved it for 30 years.