Just called and booked. The person I spoke to corrected the price quoted for the single/double that I asked for, saying it was $50 rather than $65 for the North Light Workshops. I'm not guaranteeing that, but it's a nice extra savings.
When we were up there a few years ago, our cabin host recommended the last evening boat tour of the day out to Pictured Rocks. That puts the sun to the west, lighting the rocks that generally face northwest. Our trip was sunny and beautiful, but was earlier in the summer, putting the sun further north and higher than it will be that time of day this time of year. I'll crunch some numbers on the sun position for our days there and see what looks like the probable best light.
Looking forward to it.
"I'm booked and I got to go." - Robert Johnson, Terraplane Blues