Thanks for all the input guys!
I went out for a 50 mile ride today in less-than-ideal conditions (Storming at the start, fighting 20mph winds for the rest of the ride) and was fairly humbled by the experience.
One thing that'll definitely need to change for my century in two days is that I need to eat a LOT more before leaving (I had one skinless chicken breast for breakfast with a glass of water, then left), more than one water bottle (the second being filled with something like gatorade), and a bag with some snacks. Ha ha ha.
I was feeling pretty punished by the 42nd mile, hopefully if I prepare slightly better and the weather works in my favor I'll be able to handle the century much easier. Tomorrow's menu is nothing but delicious carbs.