You can't drive long distances in 4wd, if you value your ride, and even if you are offroading, the only thing that 4wd really does for you is give you the ability to get unstuck, or not stuck at all, depending on the situation. If there is some other use that I don't know about, please let me know so that I can be prepared to do it the harder way in 2wd when the need arises
If you do get stuck in 2wd, getting unstuck is rather easy. Taking a page from the site admin book, the power of a front and rear hitch with those little portable hitch-mount winches means that if you get stuck you can free yourself. It's not as _elegant_ as using your wheels to free yourself, but when men are "elegant"........
Unless you intend to hero-worship Will Smith and try to kill yourself by driving your car around on a pier, and your car is the only thing keeping you from being an idiot, you don't need 4wd.
(This is all fine and good, as long as your rear accessory plug works...mine mysteriously died, but I'm thinking of running another one out there anyhow.)