Hi Todd,
We once towed a DUKW with a CCKW using a tow bar and it worked out fine.
The only problem was the brakes, we eventually succeeded in stopping
the DUKW, but it took a few miles (we were doing 40mph). It's better
not to tow a 6x6 with your 1/2 ton pick-up unless you are doing 5mph.
Try to find someone who has wrecker or something else real big.
Good luck!!
Regards,
Auke Dijkstra
Holland