They are explicitly limiting each node to a specific "cell" location ATM as they are building out the network which precludes RV use and mobile users. Technically there really won't be anything preventing the mobile use of them in the future once the network is denser and has the capacity to handle transient users.
As for the setup it's pretty straight forward. You mount the current hardware in the general area specified by the setup instructions and then the internal setup takes over which locks in the dish x y position.
This youtube video has a tear down of the dish and aiming tech in it, it's a pretty good watch: https://youtu.be/iOmdQnIlnRo
From the FAQ: https://www.starlink.com/faq
Can I travel with Starlink, or move it to a different address?
Starlink satellites are scheduled to send internet down to all users within a designated area on the ground. This designated area is referred to as a cell.
Your Starlink is assigned to a single cell. If you move your Starlink outside of its assigned cell, a satellite will not be scheduled to serve your Starlink and you will not receive internet. This is constrained by geometry and is not arbitrary geofencing.