I somehow didn't realize I could park the rover. Perhaps there should be a combined action to do so from the interior of Laurion? After all, you're unable to do this until you re-establish power, and you aren't keen to see the extra option when you've made a quick decision to leave.
That's fair. There are a few tweaks planned to make it a bit more obvious that you can park the rover. In v0.4 there will be an action to 'Inspect Rover Charger' once you've powered up the facility, which will suggest parking it. Also, after you've parked it once, the action to park it will always be visible, but locked when the facility has no power.