I agree that people way overdo gels and water for shorter distances, but 18 miles is probably a bit high. Personally I’ll bring 1 gel and probably plant a water bottle for 12 miles.
I’ve seen people with full hydration vests for 4 mile runs though and have no idea what they are thinking.
People always complain about how crowded their gyms are in January. Funny thing is my running trails are always the most empty :)