Rode the first ‘half'(ish) of it earlier in the year with my Dad, Berwick-Wooler-Rothbury. Lovely route, as Reggie says, fairly easy to follow, nice scenery (Ingram valley is lovely), a few decent climbs. Some bits could be a pig if the ground’s wet but we had nice dry conditions and it was a pleasure. I rode my ‘cross with 40c tyres, my Dad took an MTB with semi-slicks and they were both fine.
We overnighted in Wooler and got a pickup from Rothbury, and for the second half we’ll overnight in Bellingham and get a pickup from Hexham. Even though it makes for shorter days (30-35 miles) we split it that way as it sits better for accommodation on route, since longer mileage days land you in the middle of nowhere (and also my Dad’s 71 and not up for riding 40+ miles off-road).