We got there just in time. I figured, if anything the little boat trip across the lake would be nice, and I was supposing there could be a way to turn back if needed. After the boat, there was a winding bus trip up the mountain. The view up there:
We learned a few things on the way. That marina off to the right is the second largest on the lake. The I-5 bridge that crossed over the lake is 300 feet tall, but most of that is underwater. It was built on top of the bridge already there before the lake was created.