We just came back from the maritime provinces, we had full hookups with 30amp at each park. 15 amp was also in the power box.
I don't know if 50amp is available, DW booked the reservations.
we stayed at Cape Breton national park, NS, Cavendish beach national park ,PEI and Kouchibouguac , NB
each was spectacular for different reasons.
-beaches at Kouchibouguac and Cavendish
-outdoors and wildlife at Kouchibouguac and Cape Breton
-scenery at Cape Breton
-dinners (seafood) in NS and PEI