Woodbutcher,
It is very easy in Illinois.
I've done several the same way.
Homebuilt RV. under 3000#.
They provide serial number, title, and license plates.
So easy!
Just don't bring them a utility trailer title and tell them you need plates for your teardrop (RV).
(Like the one for that old trailer frame you used to build your new tear on)
If you do, then they have to inspect it, and the real fun begins...
Rob
Waiting for "someday" will leave you on your deathbed wondering why you didn't just rearrange your priorities and enjoy the time you had, instead of waiting for a "better" time to come along...