Turbotax : "enter your car registration fees". I've the same registration renewal forms for my camper and trailer. Do I enter these also or only my car and truck?

You can enter your camper and trailer  registration fees that are based on their value and you itemize your deductions. 

You will enter it in the Personal Property section of Deductions and Credits.

Refer to the TurboTax article Where do I enter my personal property tax?