In the end I chose the best 24 hexes (out of 28) and just seamed them in two rows of 12 as that made more than a long enough scarf. I then did the trebles edging which ties it all together. Oooh, it is very warm and cozy but I'll be putting it away now until the winter.
This CAL has boosted my crochet confidence enormously and I'm very proud of having been able to follow all the instructions. Some of these motifs are so pretty I'm sure I'll be using them in future projects.