Hi Chris -
Welcome to trail running. Don't worry too much about gear. You would probably be fine just using the aid stations, but it might be a good chance to try out a water bottle of some type in case you get thirsty between aid stations. A gu packet is useful in case you bonk with a couple miles to go. You can bring a small sandwich and jam it in a pocket or hand hold it, if you worry that the aid stations may run out or won't have what you want (and you can leave it in your car if you feel reassured at the pre-race). IMHO, a hydration backpack would be overkill unless it were in the 90's and humid, but the forecast is for 45-55F. Don't over-drink, but drink when you are thirsty. If you are sweating and drinking a lot, eat salty snacks at the aid stations.
You may find yourself running along with someone of like pace, you'll assimilate lore from the community. In any case, it's not a huge distance, and if you keep puttering along you'll get from start to finish without needing special gear.
"All you really need to know is that the universe is a lot more complicated than you might think, even if you start from a position of thinking it's pretty damn complicated in the first place."
- Hitchhiker's Guide to the Galaxy