I don't have a 151. However, I did the same thing Sam started this thread talking about. Pull a smaller MV behind a M35 to big events so you have a pair of vehicles there. One as base and the other to run around in. I figured the military tow bar would be great for that. I only did it once. About 50 miles into a 190 mile round trip to an event last spring it hit me. "I spent a lot of time and money finding those XZL tires for the M715. Why in the world am I dragging it behind the Whistler when I can't even see the darn thing back there? Trailer tires are a lot cheaper and easier to find."
Plus, I can have my trailer hooked to the M35, the M715 loaded and tied down faster, easier and by myself than lugging that heavy (but very usefull and glad I have it) military medium tow bar around, getting somebody to help me hook the trucks together and then running a thick power cable over my paint on the towed vehicle that will rub a shiny spot no matter how many zip ties get used so I can have lights. I can also back the trailer up. Kind of a neat concept at fuel stops.
My trailer is the same color as my M715 and I even have the military small bucket lights on it, so it really doesn't look all that bad compared to a flat tow. Attached is a picture LibTimothy took of me showing up at the Texas SS rally 3 weeks ago.
Just a side note. The M715 t-case did get hot following along behind the Whistler when I flat towed it, the outside of the front tires got a little bit of feathering on them and I could only see a shadow of the vehicle the entire time unless I was in a turn. Trailer for me if at all possible in the future.