I also recommend Hounds of Howgate. Its entertaining and very useful! I have done the CWT with my dog and she was great company. She has the ruffwear pallisades pack which is detachable from the harness. Useful and I would decant food daily into it so it wasn’t too heavy for her and she still had a job to do. Helped with the weight of my pack too. Never a shortage with water access. I used a waist belt lead which was really handy if fording rivers so if she were to lose footing she couldn’t be swept away. Left me able to use both walking poles to keep balance. She was tired at night so she was never restless in my tent. I used Permethrin on her harness and on the her wee quilt to kill off any ticks that might have attached or were on her fur. Do that with my own clothes too. Would give her a wee treat when I stopped for a break and like me , she lost weight at the end of the journey
It was also useful to carry a wee microfibre towel which she carried in her pack for drying off before going into the tent. I used a wee fold down dog bowl. I carried paracetamol (on vets advice) in event she might have sprained anything but it wasn’t needed. Waterproof jacket for her which was really to reduce wet dog smell in the tent but I got used to it. Things I should have done?,,,,,,, took less food… I had far far too much food for her. Should have used a falconry bell so I could hear her if she strayed too far from the tent when I was putting it up… I have this now. I didnt but now have the Garmin Alpha 200i with collar which has the benefit of Inreach facility so both of us benefit. Especially beneficial as a fair bit of the trail has no reception. Enjoy