Sherwood is very, very flat. Fair play to the trailbuilders, they’ve done their best, but… It’s flat.
Not been to Hamsterley for yonks, but last time I was there there was some good stuff, but it was very badly waymarked and the fun bits were few and far between. I can’t see any way you’d get a weekend of riding at either, unless you’re doing the DH at Hamsterley.
If you want the ease of navigation and convenience of a trailcentre (which is fair enough!) then why not head out North Wales way? You’ve Coed y Brenin, Penmachno, the Marin all within not too many miles of one another and not too far to Llandegla or Nant y Arian. I may have spelt some of those wrong. You could easily stop at Llandegla or even Cannock to break up the journey.
Or as suggested, Lakes has trailcentres and great natural stuff, as does the Peak, the Dales…