Scallops is right, to a degree. Most of our off-roading is on our property where we know the conditions and are unlikely to get stuck. On the occasions when we have gotten stuck, we just walk back up to the house and wait for things to dry out. Otherwise I am usually in a group so why double-up on expensive kit? Besides, just about every Defender owner lives for the chance to justify their investment by pulling someone out of somewhere.... I have no qualms about being that someone occasionally. :p
In short, the best accessory you can have off-road is a mate in another capable vehicle.

