I have a 19... I've been trying to find a way to have 2 bikes on the bike (which I currently do on a 1UP) and 2 bikes on the front. I have a similar setup to the pic here with the box, propane and sway bar on the tongue so not much real estate. Is it a bad idea to have 2 bikes on front and 2 on bike. Tow Vehicle has 700lb tongue weight and can tow 7700 lbs?