Pretty much the whole site is sandstone I went a couple of years ago and everything on my land rover came back orange. Not the biggest site either. If you travel a bit further there's Bala 4x4 or west coyney, silverdale in stoke
I'll have to have a hunt for the bit of paper the guy gave me with the dates on last time I went. If your interesting in going on Sunday ill post the address on here. It's deffo on this Sunday 10-4 £25 when you turn up. Usually has a tea and buttie wagon. You can get around the place in pretty much anything. It's got a small lake about 4' deep. A nasty mud hole, and a short mud section. Other than that its got a number of stony/sandy inclines etc.
Get yourself to Bala 4x4 , great place there's mud,water some good inclines and rocks, and there's also the woods with a stream running through it that was very interesting last time i was there overall plenty to do ....
Depends entirely on the site. Weston coyney would be fine. Silverdale, no chance. Don't know about the others. Plenty of vids on YouTube for all of them to have a looksie.