"I think I keep trying to fool myself that fitness and youth will make up for a lack of day long runs in training. I'm considering a few races in the spring so I'll likely keep the ball rolling after I recover and build off of the endurance I have now and the wisdom I'm gaining."
Youth and fitness will carry you a long way but, when you get out in ultra territory, they may not suffice. I'd say you did a great job considering. That course sounds a lot tougher than the AR50, and the fact that you even finished is a testament to your basic fitness, ability, and especially your mental toughness. I have no doubt that you will do a lot better in races to come. There has been some mention of fueling in the thread, and I'd like to add my 2 cents for what they're worth: Both EFS and Perpetuem are good choices, content wise. They used to be quite different in that EFS formerly used only glucose for carbs but contained a full complement of electrolytes and some BCAA's for protein/tissue repair. Perpetuem, OTOH, used maltrodextrin for carbs, plus soy protein, and a little fat, but was pretty short on electrolytes. If you look at the ingredients of both now, you will see that they have converged and there is now very little difference between them, Some, but not a lot. So, it comes down to a question of taste. Personally, I find Perpetuem easier on the stomach as it is quite bland, whereas EFS has mostly citrusy flavors that are quite sharp and can irritate the stomach. Another good source of carbs for ultras is plain boiled potatoes. Dave Hannaford, a top ultra marathoner in his day, once told me he always carried them late in a race for use when he felt he was going to bonk, because they gave him a quick lift and were easy on the stomach. Plus they are a welcome change from artificial liquid nutrition drinks. I totally concur with suggestions above about mixing a drink like Perpetuem or EFS into a triple-quadruple strength slurry and then diluting it on the move with a bottle of plain water. It cuts down on the time spent mixing more frequently. All you have to do is refill your water bottle for several stops. However you decide to go about it I wish you all the best. You're off to a great start.