Reminds me of an experience on the same stream this summer. My dad and I had paid our $20 and were heading in on the road when we got waved down by two nice ladies on the side of the road. We weren't sure if they needed help or what so naturally we pulled over. As it turned out, they were conducting surveys to gather information about recreational use in the area, and what people thought of conservation methods, etc. We thought it was great that they were doing this kind of research and were happy to help. I'll admit I was eager to get a line on the water but felt this was just as important and therefore had no issue taking the 10 minutes it required to fill it out.
Meanwhile, three or four other vehicles sped past, not giving a second thought to the fact that people were standing on the side of the road and that it wouldn't hurt to slow down a bit, and surprisingly enough another truck finally stopped as well. The passenger side window rolled down to reveal the deeply tanned face of an obviously annoyed and perturbed gentleman, and as he sat glaring at the poor girl doing the surveys, she informed them of what what they were doing and asked if they'd like to help. Turns out the driver was a guide, and the passenger his client, and they would only listen to what she had to say after she presented them with ID. The guide gladly offered to fill out the survey when he had some time, but it was obvious that his client could care less. The thought "Not my home waters, not my problem" came to mind. And his situation was understandable to some degree, because he had paid out a hefty chunk of change for a day on the water but it was a slightly disturbing thing to witness all the same. The girl handed the guide a survey and the passenger window rolled up without so much as a goodbye.