Not all trailers have a battery disconnect... my Surveyor doesn't. Even if it did, the things draining your battery most likely would not be disconnected. Your CO2 and propane detectors are connected all the time and will drain your battery in a couple of days. I always remove my battery and bring it home with me. With it here, I can keep it in top shape, keeping it charged and water checked at least once a month. If you disconnect the negative side, it's usually just one wire, and the easiest to do. When you reconnect it, it will spark a bit because of the current draw of the detectors. Have fun...
J & D in Lovely Weatherford, TX
2016 Jayco White Hawk 28DSBH TT
2014 Ram 2500 Crew Cab 4X4 6.7L Cummins