Battery charging Question

[NERoamer]

Hi again, back with another question.

I've been trying to do the research on how much and often to be plugged in to maintain the battery (12 V deep cycle). I've read and heard lots of info about discharging, sulfation etc. That it's good to be plugged in but not all the time as it leads to overcharging.

Basically we have every other weekend booked through the Summer and early Fall and 2 weeklong trips. So far, I've honestly just been plugging in to shore power at home a few days prior to the trip to get the fridge going and we're using all sites with E service this season so we're plugged in at the site as well.

I'm trying to determine what the best thing is I should be doing in the time in between. Is it fine to be un-plugged for 10 days or so and if not where should I adjust. Thanks in advance for any suggestions.