How fabluous! We did 4 of the 11 Byways coastal routes (Evangeline Tour, Lighthouse, Marine Byway, cabot) on NS last year and had a blast. Actually, the best lighthouse (Baccaro Point Lighthouse) I have EVER seen was a little south of Cape Negro.
It even had a working fog horn, and it was soon remote and errie that day. Infact, if you do follow the Southern tip up the atlanic side, you will see some other fab lighthouses. The tourist trap one (Peggys cove), is worth a 10-min photo stop and that's about all.
I hope you are planning to spend a day in Lunenburg and Mahonoe Bay? Shelburne had a quaint little historic area with some very nice museums. They were even working on making this Dory boat and let us sink a few nails..
Here the RR if you need other ideas..