I didn't need to book accommodation in advance apart from Clovelly where I thought that may prove difficult to find.
My first year ended at Clovelly, the hotel on the quayside was a bit steep so I stayed at the B&B I used two days previously at Bideford before catching the bus/train home. The following year I booked
this cottage from home, and also the Hartland Quay hotel. Those two were my only bookings.
I came close to missing out at Braunton because it was RAF Chivenor airshow day, and ended up sleeping in one house, and having breakfast next door. I drew a blank at Holbeton and Ermington, and then someone offered a lift when they saw me walking to Ivybridge, I also walked inland to Aveton Gifford too.