Needing help, evacuated, battery dead

So, the two extension cords, I ran from 2 outlets on the outside of RV to freezers. My inside plugs do not work if I am not plugged into shore power or the generator is not on, so I made an assumption that the two outside outlets did not work when I turned off generator. So I did not unplug the extension cords outside. Could that have drained my battery? I didn’t even think of that, since my interior plugs don’t work without generator or shore power. I have to use d/c outlets only. I thought if I ran the generator 3-4 hrs a day, it would keep freezers froze and trickle charge battery.