Hey Amir, its nice your group are regular off road enthusiasts, and take passengers along. Its good to go spend time in the fresh outdoors. The younger set need to see how its responsibly done, and can learn a lot from senior members.
As responsible off roaders we must abide by the following rules
-Rolls bars for safety of driver and passengers
-Seatbelts and fixed seats
-Helmets if planning to do extreme off roading stunts
-Appropriate eye protection (sunglasses to protect from dust and stones thrown up by the vehicle in front
-As far as possible, try not to stray too far from the track, as 4 wheel drive vehicles tend to damage bushes and undergrowth
-As the alcohol ads say, enjoy in moderation.
-Take nothing but pictures, leave nothing but footprints (or light tyre tracks)
-Bring your picnic garbage back home, leave a clean site!
Hope to join you on your next trip!