I was just there two weeks ago and the lighting at night is terrible. Why they don't light the path up coming from the back of Meadow Trading Point area/ boat dock up to at least the first or second loop heading towards loop 800 is beyond me. It's so dark in that area that even walkers should use a flashlight.
Bike lights are required, I had one front and back as well as battery lighted Christmas wreath on front. Hubby's front light stopped working on this trip, but his back light still worked. We never got stopped. We also left our bikes for about 4 hours at the boat dock and didn't lock them up. But, some nice person placed a half empty popcorn bag in my water bottle holder. Some people....the resort was pretty empty when we left the bikes for that long so I felt safe in doing so.
The fort is an excellent place to teach your kids bike safety and biking rules and more parents should do so. It's safe enough environment that you can do this even with the pedestrians and vehicle traffic as the vehicles are required to go slow (their is even a digital speed o'meter now on the main road towards the pet play area). And personally, I know you are suppose to ride on the road, but I think little kids should be told to ride on the sidewalks until they are old enough to grab the concept that their bike is considered a vehicle just like a car.
Grab your bike lights, helmet for the youngsters and have fun looping!