Only about 350 miles each way,for my '45 Mack,but I only
towed it about 45 miles;then re-wired it and DROVE it home

,pulling my '62 one ton duallie on a tow bar. I'd think twice before doing THAT again. (Probably STILL would do it.)

Went to Reno for the Harley on my brother's word that it was great.(It is.)Also brought my '57 GMC LCF dump/flatbed from Reno. Most everything else was from less than 20 miles from home.
Speed