I've only kept dracs for a few months, but I'll bite! (hehe..)
1) I grow all my pleurothallids in terrariums and I treat the two dracs I have (D. mopsus, D. astuta) no differently than the rest of my plants. Mine are kept mounted to cork in a zoo med terrarium (same as an exo, only with one door) with the screen top half covered with glass. The humidity is around 80% with jumps to the upper 90s when misted. I hand mist my plants as needed and will typically do so lightly each day to maintain humidity. I keep the temps in the intermediate range for the species I'm growing.
2) No horror stories yet, thankfully! Although, I did start to rot out my astuta when I was keeping it in a temporary tub. Being too wet and low air flow is a bad combination for any orchid and these are no exception.
3) Uh, accomplishments.... Well, I haven't killed one yet!
4) Keep it humid, but be sure to maintain airflow. I lost a spike from my mopsus because of low humidity when I first got it, but I think it's on the right track now. I tried to choose some of the few warmer growing dracs, but most are not tolerant of warm temps! Be cautious about buying if you don't know the temperature requirements of a plant!!
Good luck!