In this video I share the approach I use for small cameo layouts by adding a self supporting 'fiddle stick' that allows a train to exit the scene. When not in use the parts are removable allowing a neater appearance in the home.
The layout is my latest cameo project, Wrecsam Canolog / Wrexham Central in N gauge, which is discussed on the blog here:
https://paxton-road.blogspot.com/search/label/Wrecsam%20Canolog