Re: CDL needed?
Many states have exemptions for rv's but the determination is add the RATED capacity of your truck to the RATED capacity of your trailer... If that exceeds 26,001 then you may need a cdl. The 10,000 lb stuff only determines if class b or class a.
All that said... I work with hundreds of people who live in and travel with big rv'r year round and have never heard of anyone getting hassled about a cdl while pulling a camper that is titled and registered to them.
I DO have a cdl but my fifth wheel weighs about 14,000 lbs with a gvw of 15,000 lbs. I tow it with a Dually that weighs right at 10,000 lbs with a 4,000 lb jeep on a towbar behind the rv putting my actual weight very near to 30,000 lbs with 16 tires on the road.... I am about 10' - 25' over max length for triple towing depending on what state I am in and I tow fast... so far, knock on wood, I have not even been pulled over in around 8000 miles of towing that rig.
You should be below 26,001 no matter how you add it up and even if you were over the chances of getting in any trouble are slim....