disconnect battery?

I decided to turn off the battery switch and leave the cables attached. I was going to hook up a battery minder but I store in a HUGE building and I'm not close to an electric outlet. When I took it out of storage Wednesday and turned on the switch all was good. Plenty of battery left (70% according to the monitor) to work the landing gear and turn on interior lights. This was an extremely cold winter here with temps often at sub zero degrees F. I have never removed batteries in years and years (25+) of boating and camping but I always disconnected a cable. Never had a battery problem. Now I think that I can safely turn it off and leave it with this camper. I'm not advocating others follow my example just reporting my experience.