Now that the weather has been nice, I cleaned the connection. The leak appeared to be from the joint of the exiting pipe from the tank.
Scamp said that the tanks arrive with that joint in tact. They do not assemble that exit pipe.
I used liquid Flex Seal liberally around the joint, applying with an old tooth brush.
No leak has occurred after 4 days at Peninsula State Park last week, our favorite state park.

