Congratulations on getting married. I wish you many years of happiness.
As for the trailer ya unhook the negative wire on both batteries then when you get home install a battery disconnect in the negative wire so all you have to do is turn the switch. I got mine at a auto parts store. They are not cheap but it's a pain to remove the battery cable every time you store the RV
Here is a link
https://www.wirthco.com/battery-doct...nnect-switches