A jockey wheel or leg doesn't really affect safety of towing. Provided the loaded trailer isn't going to exceed 85% of your towcar's kerbweight, or the tow weight limit set by the maker, you should be safe. Also, forget the chain suggested by mech29 but make sure you have AND USE a breakaway cable which will apply the trailer brake in the unlikely event of it coming off the towball.
But you may have trouble hitching and unhitching it - unless you're a candidate for world's strongest man!