If your after a good mixture of different ground Bonsal Quarry in Derbyshire is a good place. Its packed at the weekend with everything from kiddies on quads to proper full on lads on MX'ers
There is a MX track of sorts which is actually quite good, and then the quarry across the road which is great, and has some real difficult climbs etc
The other option for you is the Desert at Mansfield. Great big sand bowl and a small enduro track in the woods and a MX track in the sand at the back.
You could spend a full day at either of these and are unlikely to be bothered by plod at either. If your road legal there are lots of places you could go onto from either as well.
HTH