'Tubs is much better going from Hawes north, in my opinion.
Any sunny summers day you'll have to share it with a replica Tour de France unfortunately.
As VRT says, the road from hawes down to ribblehead is also a great road. Bellerby Ranges out the top of
There's loads of variations of route that's good depending on what type of road you want to go on where you're starting out and where you want to end up, but an easy starter if buttertubs is a must is:
Ripon - Masham - Leyburn - Hawes following the A6108 to leyburn then onto the A684. In hawes turn right before the road splits into the one way through the town centre, up and over tubs to Thwaite. Turn left at the end and follow along until just after Keld where there should be a couple of hairpins up a steep climb. Follow that all the way along and you'll come out at Tan Hill, englands highest pub.
From the pub you can drop down into Reeth and loop back to leyburn, go along to hawes and down ribblehead back to the A65/A59 or you can drop into Richmond to access the A1(M).
If you want more detailed routing, I'm happy to throw you some maps depending on what you want. I'm reasonably local 😁