As an update, I thought I'd post the fact that the WInegard Trav'ler I purchased (replaced the X2 in the initial post, and edited that, too), as of today, the Trav'ler is now installed, and connected to all three satellites.
I thought it useful, considering my very novice initial questions about this, to post the fact that the installer had requested I contact Newmar for a few answers to questions the installer asked, such as, is the rig pre-wired for satellite? YES. Wired with splitter for the two TV's in the rig? YES, and there's a pull-through wire to help with guiding the coax for connection.
I also obtained from Newmar a wiring diagram, along with a rendering of "Typical Satellite Prep" showing location of the plate access, the conduit for the coax, and a diagram showing the path of the coax. Installer said it was very helpful to have, noting this made the install process much easier. Will pick it up tomorrow, and finish whatever is needed to connect to Dish, then should be good to go... thanks again to all for your patience and guidance!
