Welcome to FOG
Sadly Sandwell Valley is off-limits to 4x4's (but you knew that, right

)
The nearest play sites I beleive are over Telford way, unless you want something tamer like over at Aston Cantlow.
Pop over to the Midlands/Black Country meet on Tuesday night (1st Tuesday of each month) and join us for a beer (or soft drink) and maybe kick some tyres in the carpark.
Lawrence
(just up the road, past Stone Cross)