I'm renting a 5X8 UHaul enclosed trailer this weekend to move some items for my daughter. Does anyone happen to know the height of the tongue/coupler of this trailer? Before I pick it up I want make sure I have the right ball (by eyeballing I'm guessing I need rise versus drop) height so the trailer is level. It doesn't say anything on their website anywhere and the guy at the place where I'm picking it up is clueless.