Car transport of extra gasoline containers
Preface: Gas cans in car can become dangerous. Use max caution and prudence.
Am using above link to start a thread of loading, refilling and safely hauling 1 to 4 gasoline containers. Believe the basic maximum amount is 4 containers of 5 gal each. Can also guess various states allow for larger quanties. Thus the required research for the planning.
Ref the link’s number 7; Consider carrying your own rags to wet with water and wipe down the filled container(s). Then throw away the rag used per fill and refill. Place emphasis on the nozzle section fitting of the container.
The link mentions when filling to have an extinguisher nearby. When transporting, recommend a fire extinguisher in the vehicle.