I read a thing on this in Popular Mechanics a few months back, basically you only have to worry about unplugging the battery and putting it on a tender, changing oil, stabilizing fuel, and your worst enemy rodents. I left a car sit for 2 days in my garage last fall and found a mouse nest on top of the engine under the cover. Take off the engine cover and stuffing the exhaust doesn't sound bad along with mouse traps. Some go nuts with moth balls or something to keep them out of the interior vents or buying a car cover but that's up to you.
