Howdo Moth,
I'm working from memory here but if I remember rightly I parked up on the verge of the B6265 just by the quarry and went through the gate and walked up the rise through the field. I'm sorry I can't remember any more than that.
I'm taking my lad to Brimham Rocks tomorrow and then down Stump Cross caverns. If we have time I'll nick along there and see if I can pass any more information.
cheers