rjm, at the conclusion of a days flying, before you start to dismantle your model to pack it away for the trip home, it is always adviseable to pump out all the remaining fuel you have in the tank. I assume you have a fuel pump capable of sucking fuel from the tank as well as pumping it into the tank. This way you won't have fuel in the tank to pressurize and flood the motor while you have in in the hanger till the next days flying. Some modellers will even tell you to connect the glow driver after empting the fuel tank, and try starting the motor to burn off any remaining fuel in the sump. This action will benefit you if you only fly weekends , as fuel left in the sump will draw moisture into the motor , thereby starting the cause of corrosion.
Happy flying , bill, the_madgenius from down-under in Australia