After camping over the past couple of days, the leak has returned. I followed the procedure once again to restore the air pocket and it stopped.
This makes me wonder if I am doing something wrong in terms of operation of the hot water heater. When I am camping, it is common for me to only turn on the hot water heater a few hours before I know I will need hot water. I will also draw hot water out of the tank even with the hot water heater in the "off" position as well. Do I need to leave my hot water heater in the "on" position the entire time I am camping? What sort of actions would cause the air pocket in the hot water heater to be eliminated?