re: Scenarios
Perhaps, yes...
What the paintings suggest is this:
The pressurized vehicle the astronauts land with becomes the moonbase and the unpressurized rovers can only travel around at a short distance.
If an unpressurized lander (much more lightweight) could be used (after all they only need a few hours to go back and forth from orbit to the ground), with a pressurized moonbus, they'd be able to either stay somewhere, travel a little or travel a lot (much more freedom on the ground and much less mass to and from lunar orbit) and even take with them the lander.