Check the states you will be traveling through carefully. In Florida, not only is the BAL for DUI reduced, but holders of a CDL are ineligible to opt for defensive driving class as an option to drop points, etc for a ticket, even when in a personal vehicle.

Florida is also pretty tough on tow rigs. There have been many cases where they have deemed that racing is a commercial enterprise, and required a CDL, even in vehicles which wouldn't normally require one. Some of the touring roundy round guys have talked of boycotting Florida races because they have had so much trouble, even with motorhomes/toterhomes. Many in the horse trailer community have expressed the same sentiment. ...I know this part is off your subject, but my point is to keep doing your homework. Even though the rules are supposed to be standardized across the country, they aren't.