I understand you don't want it to come loose Geof. I just don't understand where you think Gene should attach those chains. I don't think it would work to wrap a chain around the tire.
Hay Gene, I found these at Northern:
http://www.northerntool.com/sh.../product_13818_13818 . Funny they show it draped over a large race tire yet in their catalogue they say it's only good to a 9" wide tread max. These might work better for you if your e-track is directly under the tires, or you could put some d-rings down like I did right where you want them.
Looking how close you are at the front there's no way you're going to be able to hook into the frame and go up front like that guy did on his trailer in my earlier post. You're going to have to attach something into the frame and go out the sides at the front, or strap down the tires like I do.