Good topic. From an etiquette perspective in small stream angling, it’s pretty simple IMO. I yield to the plans of the angler who got to the stream first. If that’s me, I’d hope for the same in return.
The fundamental problem in the scenario the OP describes is you don’t know where the other angler is, and therefore where to give that mile (or whatever) of well intentioned berth you intend to give the other angler. If you walk a mile upstream or downstream from the lot, duck down into the stream, and the other angler pops around the corner, you’ve accomplished nothing…Other than pissing the other guy off, and walking a mile each way for no reason yourself. It’s a guessing game trying to figure out where the other guy is. You may run into him, or, you may end up fishing water he’s already fished, which on a small stream generally is very unproductive.
I’m like wt2. If I have my heart set on a particular stream for a given day, I’m getting up early and making sure I’m the first guy there. Sometimes, I’ll even drive most of the way there the night before and grab a hotel, if it’s a longer drive…I do this probably for 3 or 4 outings a year on favorite streams that are 3+ hours from my home. When I don’t plan to get to the stream at first light, I typically have a plan B or C for the day, and I’ll put those into action if I get to my choice A and find a high likelihood of someone else fishing it somewhere in the area I planned to. I’d rather have stream B or C for the day to myself, than have to guess where another angler (who got there before me) is on stream A and risk fishing behind him, or interrupting his plans.
I’ve had guys arrive in the lot on a small stream while I was still there gearing up. One time a guy drove from southern NJ to fish a remote Poconos stream. I had driven 2+ hours that morning to fish it too, and had beaten him by about 10 minutes. He was funny when he got out of his truck and said…”I guess I shouldn’t have stopped for that cup of coffee.” We talked a bit, and settled on a plan to split the water up for the day. He only had til noon to fish, where I had the whole day, so I told him I would hike up to a set of waterfalls on the trail about 2 miles up and not fish until I got above the falls. He could start at the bottom of the trail from the lot and fish up to the falls. Never saw each other again that day, but I still had a good day fishing. Hope he did too.
Earlier this year, I drove about 3 hours the night before and grabbed a hotel to fish a small stream in central PA the next morning. Combination of a slow MTO breakfast order at Sheetz, and a wrong turn on the way to the stream that morning had me get there about 20 minutes later than I had planned. Sure enough, there was a vehicle on the way in, though below where I planned to fish. I stopped and rolled down the window…It was actually the Lively Legz crew of YouTube fame. I asked them what their plan was, and they were planning on fishing up to where I was planning on starting, so it worked out fine. Good karma perhaps from the day I shared the Poconos stream? Real nice guys who tie some real nice flies by the way.
Not all the times are vehicles there for fishing though. I tend to assume everyone is fishing, but many times folks are just hiking or out for a walk. During Spring and Fall hunting seasons, many vehicles are hunters as well. It’s a calculated risk based on the context clues of the vehicle.