Do I need to take my battery home to trickle charge?

I made my first travel trailer purchase and keep it on leased land in Illinois where it will stay all year. It's a 2006 Cherokee with one battery next to the propane by the hitch. I can connect to power while staying at the camper, usually 2-3 days at a time, but need to unplug when I leave. Can I leave the battery in the unplugged trailer for a month or two between visits or do I need to take it home with me and keep it on a trickle charger?