Towing Howstuffworks
I know it is a zombie thread however it's really very relavent to my final weekend towing the boat. Darn - I was type looking ahead to a dialogue about towing canoes. My boss in the 80's buckled the rear quarter panels on his Volvo 244 rally automotive by tying it down at the rear of the frame rails. I suppose the level of overkill also has to do with distance you are towing. The trailer has springs to absorb a number of the bumps.
I even have at all times been informed strap down the wheel/axle/lower management arm to the trailer. This is due to the fact that I cut off a foot off the end of the trailer so that I could fit it into my garage. Later I "beaver Tailed" it so the wheels of any car are compelled ahead enough that loading backwards is required. This goes for wheels, straps, ...