Next month I'm planning a walk that will include a section from Kelso to St Boswells along the banks of the river Tweed. On the western outskirts of Kelso a picnic area is depicted at grid ref NT 721343 but no path is shown following the river until NT 719338. Can anyone advise me whether it is possible to walk along this section of the river?

A path is shown running northwest from the road at NT 722343 just inside Kelso Bank Plantation but this runs very close to Floors Castle and I'm doubtful whether it is available without paying an entrance fee.

All information gratefully received.