After talking with the guys who are teaching my class, I don't have to add another light to the mast! The anchor light will do double duty as a steaming light if I run the sailboat at night on the motor.
I don't plan on doing that very often, so I hate to spend the money and the effort for something I might need once.
I looked again at putting a tent over the boom for camping. It's doable, but that might have to wait until next year, unless I try making my own tent. Hmmmmmmmm...