I don't know about Truro or Antigonish.
I did drag Ran out to Old Ashburn when we had some time to kill in Halifax before our flights off island last summer. It's a crazy little par-66 Stanley Thompson design ... cramped, not in the greatest neighborhood, and they don't spend much money on it. But it was packed with smiling golfers and there are a couple of holes worth seeing.
I work at both
Truro - has a few Thompson holes - but I expect it's not what your looking for.
Ashburn (Old) - they are about to invest in it starting next year
Thompson nine holes are worth playing - quirky and occasionally great
The newer nine (its mixed in) is not very good
There other 18 has taken all their resources
It's held Canadian Amateurs - solid, pretty but modern
It's right beside the airport
People rarely do this, but fly into Charlottetown PEI
Golf there and take the ferry over from Woods Island to Antigonish and drive to Cabot
Particularly if you are bringing the family
One last note: Nell's Harbour for Seafood Chowder when driving the Cabot Trail ... drive the Cabot before you add a fourth course - its worth it.