I store my rig with full gas tank - adding fuel stabilizer and running the generator b4 storing is good idea. I keep my rig plugged in during storage - my converter is "smart" so it keeps the coach batteries charged without damaging - I also added an inexpensive Trik L Start which insures my chassis battery is kept charged. I don't disconnect my batteries. I turn my fridge off (why waste electricity) but do keep the doors slightly open to avoid mold issue. Air conditioner isn't required in my area but I do use a small dehumidifier. My rig sits level on gravel - no leveling jacks.