Chances are when yo get to the bottom of the steep decline, you are going to hit the back end of your trailer, possibly causing some damage even though you mention that wasn't your concern. Same will go for when you are leaving the property. All trailers are not created equal regarding height clearance and you can notice that the trailer in the linked video is setup for off road trailering, meaning higher clearance than normal trailers.
Does that 16% grade gradually get less steep to make the angle at the bottom you will need to clear less? I'm not certain I would take a chance