This is what we did NOT read before driving happily along and now we also understand why the park rangers wished us good luck...
So, we did not know that we were about to drive one of the hardest trail in the state although it was written on our map, on the flyer we got at the ranger station and on the big board as you start the drive. We simply did not read it... Maybe sometimes it is good not to know everything.
We just wanted to drive in, hike a bit and camp somewhere in the park and then leave the next morning. It turned out being quite a drive with one of us most of the time in front of the car spotting the best way to go. We knew that the car was capable of a lot but we did not really want to try it out because we did not want to break it. Now we know more.
The fact that the hike was longer than we expected (our mistake again), that we had to hike the last hour or so in the dark (luckily we were clever enough to bring head lamps), that we lost the trail for a short while and were hungry and tired is something we don't really remember anymore. Somehow it is almost always worth it.