Saving my battery

[GoddessMona]

I have a 2720 SD trail Manor I believe it's a 2006. I spend a lot of time boondocking cuz i work with fire crews, I'm wondering is it possible to completely turn off all electricity to save my battery without disconnecting my battery?

I have tried turning off all of the breakers inside at the hallway breaker box but my light still work and my radio still turns on. And I would like to be able to use my power only when it's needed so that it's not draining my battery when not in use.