Water is the major concern
- Drain all the tanks - fresh, black, and grey water. Open all spigots so the feed lines drain. If you have low-point drain points on your hot and cold feed lines open them.
- Turn valves to water heater to bypass mode
- Open drain on water heater and let it drain
- Reinsert drain plugs removed above.
- Use an antifreeze bypass valve between the pump and the freshwater tank. You may need to buy and install one of these.
- Close all faucets
- Turn on the pump with the feed tube in a jug of RV antifreeze.
- Go around and turn on every faucet, in turn until antifreeze comes out. What flows out will fill the p-traps and some will drain into the gray/black tank. Don't forget the shower, toilet and any outside water connection.
- Close the anti-freeze bypass and drain out the tube.
Battery
- disconnect the battery or the vampires will eat it up
- Some people take the battery indoors/garage, others leave on battery tender, others just plug the unit into shore power once a month to top the battery off (reconnect while this is happening)
Fridge
- Open the fridge door(s) and prop them open
Food
- Remove all food. Canned / bottled can freeze and burst. Dry food can attract vermin. All food will go stale.
Vermin
- If there is a chance of attracting vermin, remove all soft goods that might be shredded for nesting material -- paper products, clothing, linens, cloth bags, cards and games, etc.
- If there is a high probability of vermin, consider dryer sheets, peppermint oil, mothballs, traps, GreatStuff in the holes to the outside, etc.