I assume by down the Dales you mean Grassington – Bolton Abbey – ilkley? If so there is a reasonable amount of climbing on that section. To avoid the worst bit (out of Burnsall) B6160 Grassington to Burnsall. Cross river in Burnsall and take back road to Bolton Abbey, then cross the foot bridge near the cavendish pavillion before the Abbey itself, and take the main road towards Ilkley.
Once you have ridden up the Cow & Calf IMO there is no point in following the ‘official’ route. The roads up there are narrow and very busy (not good for bikes) and the route just makes you climb narrow busy roads, just to loose all the height again to climb Otley Chevin.
Get back to Grassington the north side of the Wharfe on nice quiet cycling roads… with 1 or 2 very steep sharp climbs.
The Otley climb is hard and steep continuous gradient, good to say you have done it, but no nice roads/scenery when you get up there…
I reckon if you do the full ride it will be 4-5,000 ft climbing ?