Here's goes nothing - my first rv discussion...

"commercial" is one thing, like my company has been hired to haul these goods on someone Else's behalf, and my hired hourly employees do the driving and our business is mostly hauling goods for other people for hire, but a business expense, as in ' the money my business paid for my travel was in order to conduct business in a different location' is another.

that said, I haven't delved into DOT regs either.... so I could be talking from the wrong end here.