Pastor, I don't really believe you will ever have a condensation problem in this part of the country. A lot of it has to do with extreme temp differentials and long term storage. I would suggest if you are going to store for a couple of months or more that you fill tank and treat with Stabil. I run mine down then fill. I have run boats all my adult life in all kinds of climates and never had a condensation problem. If you are worried go to walmart and get one of those screw on water filters with the base and install it in your fuel line close to the motor as you can. Then change that filter once a year. Your biggest problem is age of gas when it comes to ethanol gas. It breaks down and causes what is called phase separation. That's when the moisture shows up. Believe it or not your gas has a certain amount of moisture in it all the time. It's just mixed really well and will not hurt anything until it starts to seperate. All that said to say this, run it down as far as your comfortable with then add make up gas.