Ok, here is my rover mission at lift-off:
I know, it's way overdesigned, but that was initially my launcher to a Jupiter moon, that's the reason. My ship quickly reaches Mars orbit:
The rover will aim for the highest montain in the solar system, the Olympus Mons:
Then, after a small trip around, the probe and its engine are separated from the rover to join the orbiter:
After refuelling, that small unit has enough capacity to visit Mars' moons, so let's go:
And finally, the probe returns to Earth:
Mission accomplished!