The air conditioner will need the generator which runs on propane. I have the same rig and can run that for about 8 hours before running out of propane (a whole driving day). The propane tank is a 12 gallon tank, but 80% of that is 9.6 gallons. Depending on how long you’re going to be and what the weather is really like, parking in the shade, leaving the back windows open with the fan on will provide good air flow and ventilation. Even if you’re running the AC, always have a backup. Your backup is windows open and fan set to run at a certain temperature. There is a temperature knob right on the fan which you can turn to control when the fan comes on and shuts off. If they’ve switched to the fan to something with a rain sensor, then any rain you get could foil your backup of having the fan come on when it gets hot as it will close automatically, but not reopen again. Having something to remotely monitor the temperature may give you peace of mind, but checking on them every now and then if you can would be good also.
If they’ve not done anything to increase the battery capacity nor added solar, your boondocking without moving will be limited. Depending on how much electric you use, it might last a day, maybe two without running the generator or driving. There is one group 24 battery if it’s unchanged from original which has 79 or 80Ah, half of which is usable to not discharge the battery below 50%. Be sure to turn off anything electrical that you’re not using to conserve. Hopefully they’ve changed out the halogen lightbulbs for LEDs otherwise, those take up some juice if you use them a lot and stay up late. The propane valve takes a bunch and it’s on 24/7 so just be mindful of items that are a constant draw and those which you can control the usage of.
Use other bathroom facilities and the water and waste tanks will last longer.
Anyways, hope that helps. Take notes on the walk-thru so you remember afterwards. There’s lots of little details to remember.