How long will the batteries last

That was a pretty good run for 6 days of camping without hookups. That is our preferred method of RVing although we don't attempt to be so frugal since we paid for all the creature comforts available on our RV and fully intend to use them with or without hookups. We have a pair of 6 volt GC2 batteries, some solar, onboard and inverter generator with Iota IQ4 converter, and 2 inverters to keep us up and running as if plugged into shorepower. We did go with a full conversion to LED lighting a few years ago which felt like we added another battery to our system. We can run our HDTVs, blueray dvd game consoles, HD satellite, Bose system and sound bars, convection microwave, and our RV AC unit as we deem necessary. We thoroughly enjoyed roughing it in our tent camping days, alas that phase has passed and RVing in our rig is not much different than being home.