AAA Magazine - F450 Commercial Drivers License ??

Generally speaking, in Illinois you are not required to have a CDL or anything but a regular driver's license if you are driving a vehicle registered in Illinois as an RV.

I haven't heard of them wanting to change that. I would suspect if a couple of very large RV's caused some fatal accidents that could change in a hurry. The state is completely broke and they are always looking for ways to increase fees or add expenses for drivers.