Back in the Dark Ages (like 1965 or thereabouts) when the first dune buggies came out (the Meyers Manx), we used dual handbrakes on the veedub chassis's, since there were NO traction aids for beetles, or at least none we could afford. Worked like a charm, IF you could steer, shift, clutch, accel, AND yank a pair of ebrake handles. You only got one additional hand if you had a passenger, because he was holding both your beers in the other....

Not responsible for advice not taken...