Ayuh,...... Don't worry 'bout it,.... It'll be just as dry then, as it is now,......

Why can't you just put some tape over the vent ?. I don't see an issue with that unless your tank is filled to the top of the hose and needs to expand and contract. JMO

I’ve been doing the same thing seafordguy does for the last 35 yrs. I fill up close to the end of the season, use it a few more times, usually leaves me with around half tank. Put stabilizer in it, store it for the winter and top off beginning of summer with fresh fuel.

I always drain the tank(s) before winter storage. No sense letting perfectly good gas sit when I can use it in cars, toys, and power equipment. One spring, just for grins, I tried pumping the dry tanks again to see if any significant condensation gathered. None, bone dry.

Fresh fuel in the spring. Never had a problem in 25 years.

ditto
I fill 91 octane non ethanol
Add fuel stabilizer

I have to open it up maybe
During winter as my fuel guage stopped working right aftet i filled it up
hoping just a wire came loose
Have not been mobile enough to chase it

He`s a little special

Condensation
 

If there is enough condensation for it to matter, you will be able to pump the water out before filling with fresh fuel in the summer.

just to understand, Gas was drained because it was old not because it was drained just for storage. I even considered polishing the old fuel, but for $750 to do so, I drained it into 50 gal. tank.