Stopped by the gazebo today. There were some people on it so I didn't go on, but got a few pics. First is the Gazebo itself and the other two what are on the opposite side of the river. The Gazebo itself is probably 40 feet up from the water at its highest point.
There is a ~25 car parking lot within 150 feet of it, but I suspect it may fill up quickly (there's a ball field right there). There is another, much larger gravel lot farther away (not too far to walk) that would handle overflow.
I'll update the second post of this thread soon with details on how to get there.
I think we did a great job with the location!