My 2008 Starcraft RT14 has a plaque riveted on the frame in plain view...
I also found the VIN number on a sticker on the frame that identified the weights information...
All photos Roy"s images
The VIN number was also in my package of installed Appliances and items which is a whole bunch of brochures and paperwork that was bundled in a very large envelope and stuck in between the water heater and the wall inside a cabinet.
I have also heard that the VIN number is also stamped in the top of frame rails under the trailer but I have never looked for it there...
Also note i have WHITED OUT my VIN number for obvious reasons...
Roy Ken