Rent a Bike
Comfortech Bicycle Rentals (off the West Dock behind the Westview Tavern) rent out bikes. If you are arriving on foot this is a good transportation option because walking distances are quite long otherwise and there is no public transportation on the island. I didn't rent a bike, so I don't know prices, but they must be fairly reasonable since I saw many people biking. Open daily 9am-7pm (as of 2006). Reservations available.
Pelee Island Ferry
Ferries depart from Leamington or Kingsville to Pelee Island depending on the time of year. Cars can be taken on board and are recommended because there is no public transportation available on Pelee Island. Reservations are required if you are taking your car and you must be at the dock an hour prior to departure. Walk-on passengers should be there 1/2 hour before, but reservations are not required.