My layout is end to end straight line station to fiddle yard.
I use Kadee. Firstly, being no curves on my track I can couple stock really close together by selecting the shortest coupling possible. Secondly, I have a magnetic under track uncoupler in the station and an above sleeper magnet in the fiddle yard. Provided I stop the train in the station at the correct place I can run in a train, pull in a loco at the other end and then move out the stock, leaving the original loco in the station. The process is reversed in the fiddle yard. I can sit in my chair without having to get up! And no hand of God.
Terry