Ranger Camouflage does not work in all of the outdoor locations. I will try to generate a list of as many places as I can. This was an issue over the summer, but I never wrote the areas down or posted about it. I am going to try a lot harder to help out and take some notes when I am playing, and not just on this issue, of course. I found the following two locations to have a problem with camouflage yesterday:
High Hold
Silver Marches
High Hold
Silver Marches