Hagerty does cover larger vehicles (my 1954/55 2-ton GMC COE with long flatbed is covered by Hagerty). I told Hagerty that I might use the COE to carry another collector vehicle to a show or cruise-in - no problem.

However, they will only cover a "collector" vehicles. They will not cover a vehicle that is used for daily driving, or a vehicle that is used for commercial purposes. In addition, Hagerty requires that the insured collector vehicle be stored in locked storage.

I'd try State Farm, as suggested by others.