[Yetti]

you can put it on Jackstands, that will save on tires & bearings. the second thing would be change the oil, put in fresh engine oil. if its sitting a long time it can draw in mositure. when you get back first thing would be to pop the plug and see if theres water pooled by the drain plug. if so drain and refil. same goes for any stored vehicles. the fuel will go bad , but the tank is vented and will draw mositure. if the tank is full the air space in the tank is reduced and the amount of air being exchanged is less as the tank is heated and cooled during the changes in weather & heat/cold cycles. the Sta-ble in the fuel will help to keep it from breaking down as fast. use dry gas to break up any water when re-activating the system if you suspect it may have water in it. if by chance your storage space has moisture in it then I suggest a non powered humidifier. use a bag of rocksalt(in a burlap sack or its equal) hanging from the ceiling. use a barrel or bucket depending on how moist the air is. we used to keep our basement dry by hanging one over the floor drain. it would drip constantly. for some reason the air sticks to the salt if it has moisture in it. put the rig in a corner away from your car and it will be fine. you can even route it out a drain to the outside if you think it will over flow or nobody will be around to check on it regular.
by the way take out the battery. set it on a board(wood) and get a r/v charger to save it from going flat. I use a 250 milli amp and it clicks on when it sees a need. the reason I say to take it out is to prevent accidents. I have had batteries explode while being stored. one blew up and sent acid everywhere. I didn't find it for days, to say the least I had a mess & damage to clean up.