Not really a big deal. The whole CDL/No CDL or Commercial/Not for hire game will continue to be played on the highways like it has for years.

In order to protect yourself, you need to understand the rules and know how to stay out of trouble.

1. NEVER ever stop at a scale house, weigh station, or port of entry.
2. Maintain your equipment in good working order. (clean, lights working, good tires, mudflaps, current plates.)
3. Avoid getting pulled over, (speeding, accidents, lane changes)

Just sticking with those three things will mean you will likely never have to have a discussion with a patrolman or DOT official about the status of your rig and whether it qualifies as a commercial vehicle or RV.

Should you find yourself in a situation where you are forced to be a roadside lawyer trying to avoid a ticket:
You need to know how your State's laws may differ from those around you, for instance AZ's plates say "Commercial" on all vehicles rated 1 ton or above, and law enforcement from other states always try to say that automatically includes you.
Be prepared for their line of questioning. It's a show car, not a race car. You are not sponsored by anyone and NEVER race for money.

Between myself, Dad, Mom, and my three little brothers, we've got nearly 200 years of CDL experience. We've got nearly that many years and many miles of RV/Hobby towing as well. Throughout all that we've only had to defend our non commercial status twice with our race rigs, and we're able to avoid a ticket on both occasions.