I returned to Duck Mountain Provincial Park to complete my playback experiments. I had a great morning until one of the iPods I was using did not play its song recordings. When I checked it, I found that my batteries were dying.
Gas is still much more expensive in Canada at $0.99 – $1.03/liter ($3.75 - $3.90/gallon). Although I would rather pay less, it is a shorter distance going across Canada back to NH then returning through the US.