Personally I'd take the man up on his kind offer, green laning is not all massive rock steps and driving through swamps. For most people off road centres are a mayhoosive waste of money as most green lanes are just like un tarmaced roads and you just drive at a speed that is proportionate. Landys as a whole are more than capable with coping with 90%+ of the green lanes most people drive along and if you do find yourself going for a play on your own walk the lane first if you're unsure.
Failing that go and have a try at a pay and play site where there's always people to come to your rescue, although in my experience pay and play days are a lot more extreme than your average green lane.
And don't forget on here give as good as you get