You can get this easily by parking your rover and letting the 30 minutes run. The only downside is that the engine is still running, which is okay since it doesn't use fuel, but the vibration doesn't seem to stop, so your controller batteries might run low vibrating for that long.
Personally, I hopped out of the rover in 3-minute increments so that the clock ran while my controller didn't. (Edit: several people have commented that pressing the
button lets the clock run without the vibration. Thanks!
It appears that this is NOT cumulative, at least insofar as leaving an area and coming back in.
I hopped in and out of the rover and it didn't seem to affect it. Still, I'd knock it all out during the first rover part. While you're waiting, go looking for the monolith from 2001, or the lunar lander for this one: