I leave my batteries installed for winter storage.
Our boat and RV have electronics that will slow drain a battery, so both have a disconnect switch.
Prior to winter storage I top off the cells with distilled water, and clean posts as needed.
To make charger connections quick, I installed a 12V power outlet
connected to the battery on our Boat, RV and Tractor.
I have pigtail with a 12V plug
on it and every month I connect a Shumacher
charger, plug into the outlet and charge at 5a until the battery is at 100%.
The 12V outlets make hooking up the charger quick, where batteries are harder to get to than opening a hood.
My truck doesn't get used much unless we are pulling or need 4x4, so I also clip the charger to its batteries once a month to make sure they stay ready to go as well.
Our cars are driven daily so not an issue.