You may want to consider investing in off road equipment such as a good condition spare wheel. This is the bare essential necessity that should accompany any off road journey. Furthermore, a sturdy tow rope spanning between 5 to 10meters. This is important because if you do get stuck, you do not want the other vehicle to land up in the same soft ground as you. Buying readymade towing ropes aren't that expensive, but if you prefer you could have them custom made. If you use a steel tow rope to pull a vehicle out of a sticky situation, make sure to place a thick cover on the cable to reduce the possibility of the cable snapping and causing serious damage or even injury.
You should invest in a decent Bow shackle or D shackles, as it remains the safest manner to connect tow ropes. The most popular is the Army folding type, which conveniently stows away in your 4x4.
Front Runners is a convenient online shop for all your off road equipment. They have everything you'll need for your off road adventure, including cargo restraints, battery equipment, clamps and spacers, electrical components, roof racks, rooftop tents, tent mounts and storage systems.