Park It & Forget It doesn't work! Preparing your vehicle for your winter departure is easy and fast by following a few steps. The first thing I like to recommend is putting a shot of gas line antifreeze in the tank and filling up. This will eliminate any moisture build up in the tank and ultimately eliminate rust. While many people like to disconnect the battery I prefer to leave mine alone and install a battery minder. This will keep your battery at optimum level by allowing it to run down and then charge just as it would with regular use. It also means I don't have to reprogram my radio when I get back. I leave the windows open slightly, and install a new Febreze to keep the smell fresh and clean. The last point is make sure you have your tires inflated to the recommended pounded for the temperature.
TIP: if you have an older model and it leaks a bit of oil, place a piece of cardboard under the car
Parking for an extended period in a hot, in my case a 100°+ garage, requires some additional care. Just like winterizing I top up with gas, usually get a full service oil change, have the vehicle washed and install a battery minder. There is more chance for spiders and other critters to get in the car so I don't leave the windows open. I find in the hotter climate my tires tend to lose a lot of air so I make sure they are well inflated before parking. This also minimizes the "flat spots" on your return, usually after the first couple of miles they are round again and not sounding like you are going over a washboard. I like to leave the hood up as well just for air circulation, don't know if it adds anything but its something I do.
TIP: If you are parking your vehicle outside put the tires on plywood boards, taking them off direct contact with the cement, will make them wear a lot longer
Apart from needing to reprogram my radio on return I also keep the battery connected so the alarm system remains functional. In addition to the automakers alarm I also have aftermarket devices which sense if the vehicle is moved from its location. If it does I get an alert to my smartphone and I can alert police to a possible theft and provide the vehicles location.
Another thing you may want to consider is changing your insurance coverage while the vehicle is in storage. If no one is driving it all you need is fire and theft coverage.
If you are a Canadian Snowbird you will have first-hand knowledge as to how much an oil change and filter changes cost in the north. Before heading home I pick up a couple of air filters and cabin filters for my winterized car at my local Pep Boys or O'Reilly's - they are half the price!
HAHA: There are no Canadian Snowbirds who cross the border south with a full tank of gas, nor crossing north with an empty tank of gas, lol