Lately I have been playing quite a bit of this ‘game’. And I say that in quotes as it is also very educational. It even peeked my interest in astronomy, I bough the astronomy for dummies book as well :).
A while back I finally managed to put a rover on the Mun in career mode. It only functions once it’s in the sunlight as it is electrical powered. The pics show a Kerbal (Bill I think) driving it, but it also drives on it’s own). It’s still sitting on the Mun ;).
I’ll try to post more as I get further and further into career mode !