Scott,

5 gallons is just about what I use for what you would call a Sailing
Season but I leave my boat in year round and on those nice NW winter
days I sail. I motor sail for two reasons; 1 Two get cabin heat from my
Red Dot heater and
2 To get rid of the fuel I put in, in the Spring

I have a 20 Gal fuel tank and more often than not, I'll have a 1/4 tank
left come spring. This I pump out in the spring. I give it to the live
aboard ten slips down from me for heating fuel.

I fill the tank each spring, hoping to fight condensation (?) I have a
filter/liquid trap but an active tank seem to work best for me.

With you pulling your boat for the winter, that 12 Gal tank was well
thought out.

Ole Thom