I decided to send my Munar Science Rover to Minmus, figured that it should make it since everyone says the same rockets can travel to each. Unfortunately it was clearly going to run out of fuel while circularizing it's orbit prior to setting up a Minmus window, because I never circularize my orbits when going to the Mun. To make matters worse, I'd accidentally switched to a nearby orbiter before I figured out it wouldn't make it, and therefore couldn't revert the flight. Also, being a Mun/Minmus lander, it had no 'chutes. Rather than attempt a rescue mission, I thought I might be able to use what little fuel I had left in the LV-Ns to deorbit, and cushion it's crash enough for the vehicle itself to survive. It all worked well at first, had enough fuel after de-orbiting to burn hard as it neared the ground. Just before it hit (at about 100m/s) I separated the rover from the rocket, thinking that little bit might save it. It didn't. After the massive explosion, however, I realized the command module had somehow survived, so the two pilots survived as well. Sadly, the two in the science module did, but since they had very little in the way of courage and were mid-range stupid, I didn't mind terribly letting them be the first two Kerbals to enter the "Lost" section of the manifest. Also serves as a reminder to double check my calculations before re-purposing vessels to other roles. I'm still working on a way to get that rover to Minmus.