Hi Ben, welcome to the forum.
You are always limited with that size as you can imagine. The main issue is the radius of the curves.
One alternative is to narrow your layout and create a yard, perhaps with a turntable on one end; a station or another point of interest like a mine or goods terminal.
You can run the locos up and down and shunt the wagons around. You could always provide for a run around track that goes around the back - that can be dismantled if space is an issue and set up when you get your layout into an area with more space.