You may want to call DMV and double check this before making any plans. We used to get "Trip permits" for our semi trailers at work. We use them as towable sheds. They would get towed to the job at the beginning and towed back to the yard at the end of the job.
They are no longer issuing these permits. Its either register or nothing.
I dont know about cars/motorcycles though. Ive only gotten trip permits for commercial vehicles.
Justin - KG6BWS
"Not all those who wander are lost." J.R.R. Tolkien