Grant made an interesting comment about IG's Photoposts.
I think an educational starting point would be a conversation with IG - you both spend time on the same Island and with ice-out on the doorstep, it should not be long before you both are enjoying the Lake for another season. An afternoon sit-down on the dock, yours or hers, should prove very enlightening.
The ducks are close to being in a row - someone to publish, someplace to sell, and customers waiting with baited breath. All that is needed is photos. It would be of great assistance if the Photoposts could be used for the calendar project.
Therein lies the challenge - getting permission and whatever that may entail.
