Since my batteries are inaccessible and not located near the frame, I had to run the cables from them out to a more convenient location so that I could disconnect or reconfigure them. From that point forward to where I have the common ground point was only 1.5'-2' so it only "cost" me 3'-4' more cable to run the separate grounds. So in the whole scope of the project, saving $5-6 on a few feet of cable was just not that big a deal.

In my daily driver, I'm planning to relocate the single battery back into the bed and will be running separate power and ground cables (1/0) to the front. It is unibody construction, so no heavy steel frame to bolt the ground to.