We have the Garmin RV890 and it includes updates of maps and operation software at no charge. In other words, maps and functionality remain current with new devices. We purchased one of the Garmin cameras and it worked great with the main screen, but the camera itself was of marginal picture quality. The lack of contrast made it hard to see vehicles until they were close. We use the window mount. The magnetic connection is the best of any device ever and DW can easily remove it to work with the GPS in her lap and then reinstall on the window.
I have not tried to import our RV Trip Wizard maps into the Garmin, but will give it a try. Thanks for the tip.
Mike