There maybe a parallel here.
I am gone from my car 10 months of the year.
I disconnect battery.
Come back after 10 months reconnect the battery and start the engine. Of course, without battery power, the computer is wiped slick..... I have to drive the car for a few days before I get the emission check performed.
My boat, electrically nothing changes..... hooked to shore power, battery charger. on. I am gone for 2 months...
I do open a few unnecessary breaker (things such as the stove, hot water heater, electronics, FW pump and Vacu-flush head etc) at the panel and shut off all the inverters. Shut off the FW.
Beyond that, nothing changes. Yes, I have a separate 40 amp battery charger....
The main 1500 amp inverter and 2 smaller inverters, I shut off. The 2 solar panels should keep the batteries charged if one of the snot nosed kids unplug my shore power again.
I do not shut off the 12vt fridge. Lock the doors, check the dock lines and walk away. I do leave one 120vt lamp on so the neighbors can tell if the shore power has been disconnected or shut off.
I would encourage you to write a list of things you shut off or disconnect.
Did Noah have a get home-engine?
Which weather app did Noah and Columbus use?