I would spend a little time checking the house batteries..you probably have two 6v deep cycle to make sure they are fairly new. Without good amps, nothing works on your house...most if not all controls are 12v...
Check out the generator...change oil and filter....when running, it charges your house batteries...and some also charge your engine battery. Check it too.
Set up camp in your driveway or go to the nearest RV park and set up. (wife follows in car to go back for whatever you forget to bring)
Hook up dump hose....dump black water then gray water....
Drain water tank as you never know how long it has been there by previous owner. You might put in 1/2 cup of bleach and run it through the system and leave it for 3-4 hours then flush well.
Read the MANY posts here and ask any questions you have here as these folks have been there, done that.
Have a ball...hey go where you want to go...that's RVing....good luck.
USAF Ret. Sony Corp. Ret.
1999 Bounder 34J, Ford V10