The usual trick with grockles is that they may pull into the passing space on the opposite side of the road to the direction they are travelling, rather than stopping short of it, letting you pull into it and the driving on so you can get out again. In Scotland I was forever finding that I'd get to a passing place first (on my left) and pull into it, only to find that the oncoming car then also pulled into it, so we were still nose to nose - just in a passing space rather than on the road. Foreign cars were a *lot* more disciplined than British (especially English-reg) cars. I had one driver yell at me "I thought you'd carry on - I didn't expect you to stop as well". There's no "as well" about it. I was the car that was expected to stop and he was the one who was expected to carry on because the passing space was not on his side.
But you don't even need single track roads and grockles. There are several roads which I drive on regularly which are nominally two-way but routinely have cars parked on one or both sides of the road, which reduces them to single-track. I size up the situation: if there's nothing coming towards me in the middle of the road, I continue; if there is, they got there first so I stop and let them pass, before temporarily claiming the single track road for myself. Several times I've done this (using only brake lights, no left indicator) and had a car behind overtake me and then meet head-on the car I was waiting for. Is there something extra I should be doing to signal to the car behind me "I am stopping to let oncoming traffic through - I cannot continue or we'll collide. You need to wait behind me."? And that's people who are probably locals like myself.