Doesn't sound like the Oban I know and love.
They do get Microlights flying in there, but in the many times I've visited, I don't recall them flying a different circuit.
Given the terrain and weather, the usual approach is to fly the downwind over the water to the west of the runway. Paul and Brian man the radio and will advise you of other traffic around the place. There are sufficiently few visitors that you will be unlucky to find anybody else sharing the circuit with you.
Under the circumstances, an overhead join is just that, unnecessary overhead.
2D