Originally Posted by Sinecure
If you want to keep your black tank full, I would dump it and fill with clean water. You could even add some of the new "RV septic chemicals that break down waste. You don't want to return to a hot, smelly camper.
Good call; better to have water in the black tank with a little blue stuff than waste. How about fridge? I suggest either open and off, or if there is food inside, turn it down one notch. I find that long periods of inactivity causes freeze up. Of course, keep the shore power on to keep battery charged. AC and heat "off" unless freezing is a possibility. Vents closed for fear of rain/wind. Water pressure off, pump off. TV antenna down. Fresh water dump valve open. Perishables, milk, bread, etc --- pitch before leaving! Hide spare keys or leave with a friend. Lock shore cords, propane tanks, surge protectors, hitch ball coupling, hitch lock clip, etc. Take pictures before you go, in case it looks different when you return! Try not to worry!