Your trailer should be level when towing. A level trailer is the safest and most fuel-effective way to tow. Switching ball mounts and using an adjustable hitch like the Uriah Products Aluma-Tow 6" Drop Ball Mount for 2" Receiver will make it as easy as possible to get your trailer level. However, if you’ve tried everything but still can’t get your trailer level, the next safest option is to have the trailer with the nose slightly down. If you have to do this make sure that the tongue capacity of the hitch and vehicle can withstand the extra weight. So to sum it up, towing your trailer level is best, but if that’s not possible go with the nose slightly down but take extra care driving.