Tom, great combination you have chosen for your camper.
A couple good bets for answers would be to Google your antenna and then choose the "E Ham" review and go to it. Read the comments and choose one or a couple hams that are commenting on the antenna and ask them your question. They will probably have the answer.
Another place to go to is K0BG 's site and read it over. You may be able to answer your own question after reading there.
http://www.k0bg.com/ In your reading there you will find his email and he will correspond with you if you are patient.
Did you buy the antenna new or used?
Usually the whip itself does not move. The antenna will tune by a contactor moving up and down in the coil ( the large part at the base).
It would be nice to see pictures of your installation.
Good luck.