Deano - you must be slipping - can't you manage a route to take in the Buttertubs, Tan Hill and the Stang all on the same ride?
Now we are talking. Start Scotch Corner. Richmond, up The Stang, Arkengarthdale, Tan Hill, down Stonesdale, up the back side of Buttertubs to Hawes then down Wensleydale to Leyburn. No need to avoid any A roads.
The Yorksshire Dales are pretty crap in the dark though. You can't see a damn thing, even if you like the Dales scenary, which IMO is far too twee, you can't see it at night, narrow gravel strewn roads, wild sheep, pissed farmers, lampers. No, it's not all the Rylston WI getting their kit off for charity