We went to PEI about 20 years ago, and the most memorable part were the beaches on the extreme NW beaches, away from the bridge from the Canadian mainland. Beautiful sandy beaches and fewer people, and swim-able because the Gulf Stream has a back eddy which results in PEI having the warmest salt water north of Cape Hatteras NC!
When are you going?
Have fun!
Peter
PS -- The user moosetags had a thread last year which you might enjoy.
http://www.airforums.com/forums/f42/...ed-152034.html