Any entity that has designs on Mars will shoot supplies there ahead of any significant construction or occupation. Humans will "litter" the surface of Mars with supply crates and construction materials.
An automated space station will be set in orbit, having supplies and support functions for planetary landfall.
There may even be a series of caches placed in orbit with delayed entry upon habitat command.
Likewise for the Moon.
Possibly for some of the more sizeable asteroids.
It only makes sense.
In that way, scifi drives science because the scifi makes sense.
You step on the nearest rocks before you leap to a distant one.
Step, gather composure, step, gather composure and soon, you have a safe and reliable path to the other side of the river.