I was at bpw last thursday & stiniog on friday. Fantastic weather both days. Stiniog is savagely rough, the youtube videos wont prepare you. Feature wise though there is less big stuff at stiniog. Obviously everyone has a different definition of big stuff, but bpw has some big features on the blacks imo, especially 50 shades.
I tagged onto someone who had been before, thanks john & tony! So got me up to speed quicker than if I had been fannying around on my own.
The stiniog uplift is ridiculously efficient compared to bpw.