I carried a scooter on the back of our Winnebago, and now tow our BMW on a trailer. The scooter rack is brill' - fit and forget, but it does increase your rear axle weight considerably, especially if it has a large rear over hang.
The trailer being narrow is almost impossible to reverse, so the first mod' was to fit a jockey wheel to make moving it easier when un-hitched. You also have two extra tyres and wheel bearings to check plus extra lights. You will also be longer than a rack and will pay for a trailer on ferries, tolls etc.
I also carry a jack, wheel brace and spare tyre for the trailer - all extra weight and space used!!!