I finished the 50k. It took me more than 8 hours, but I finished it. The trails were very steep, and I knocked out the first 20k in under two and a half hours but I slowed quite a bit after that. I wasn't really properly conditioned for it, but I finished and that's what counts I guess.
I managed to eat a lot Friday night through Saturday. I felt disgusting. I can't remember the last time I was so full. I haven't had a true binge in a while, but I have had some large meals here and there, though those large meals are only ever one meal. It's not 36 hours of basically stuffing my face.
The other challenge has been eating for a couple of days after the race. My legs are still a little sore and I know it's important to keep carb and protein intake up post-race in order to recover, but that has been even more challenging than eating beforehand. At least I knew I was going into a major calorie burn. Eating now feels like a waste. I've been walking since but have been a little too sore for running the past couple of days (though I know a short little run the day after can help soothe muscles) but I think I am up for a few miles today. I don't have to work today so I have some time to do things.