Propstands and jockey wheels are essential for keeping trailers level when unhitched. Both are typically mounted near the hitching point, while corner steadies can be installed at either end to prevent tilting during loading. A jockey wheel adds maneuverability, allowing you to move the trailer without lifting the hitch. Adjustable jockey wheels and propstands reduce strain and make hitching and unhitching easier. For additional support, a jack can also be used to level the trailer.