Good sequence for a movie, but most likely we will pack a bunch of starships fill of supplies and land them, leaving two available for emergency return, the other N will shuttle more supplies to Mars. We can test the landing and relaunch as many times as necessary using automated systems. By the time humans land they can checkin at the front desk.

I think a base on one of the Mars moons would be nice. You can build a radiation shield and have a nice place to store your stuff. Maybe some fuel could be extracted from the regolith.