I've never had any bad experiences with dogs on the trail. This includes being barked at by leashed and unleashed furry friends- that really doesn't disturb me nor do I consider it a bad experience. I just don't approach those guys.
I've never camped with dogs. Neither on sections or the thru. Was SOBO so it was rare to see people let alone dogs.
My interaction with dogs is all while hiking. If I'm standing there talking with the owner, as is most often the case, if the dog is smelling at me or straining to get to me to smell me, I let the dog smell me and if that goes well, I pet. I feel pretty bad about this now. I never got permission and I didn't realize how badly it could upset some folks. *Thanks* to the knowledge and passions shared here- I've learned and will modify.
In the same situation, while talking to the owner, if the dog doesn't exhibit any signs at all of having anything to do with me- I would *not* approach the guy. I would make the assumption that the dog either does not like me or is scared. In this case, I always try to start moving up the trail as quickly as possible. I do this because I feel it's easier on everyone- especially the animal, as the stressful situation it found itself in came to an end...(I'm gone).
My initial reaction to August was knee-jerk and I hope amends have been made.
To the OP, bemental- it's great to hear the changes you've implemented are having a positive effect. I'm betting that continuous tweaks along the trail will keep him a happy pooch and it'll work out. Best of luck! Sorry for the thread tanget. Rooting for ya'll on the your adventure.