There are lots of federal regulations for "commercial" carriers. Most hobbiests or RV'ers do not qualify as commercial. Am not familiar with drag vehicles. Getting the appropriate CDL is not to hard and is sometimes a good idea. Less arguing with the authorities on that issue. Save the arguing for weather you are a "commercial" vehicle or not. Written and drive test for the CDL are not that bad. Study the book, and do a little practice on the skills and most people will be ok. Having a CDL does not mean that you are considering yourself a commercial carrier. Do all you can to keep out of that catagory. A private citizen with a CDL can haul 80,000# on the road with out being considered a commercial carrier.