The wifi in the North 40 has been mostly useless in my experience over several years. The explanation I've heard is too many devices are trying to connect to each access point at a time.

If the wifi antenna is on a utility pole aimed at the N40, of course it has too many devices in range! I would suggest turning down the antenna power to the minimum, and putting it inside a building or in a hole in the ground. Really. That way, only a few devices brought near to it can connect, and they will be able to get online. To serve more users, add more access points surrounded by signal-blocking obstructions, so only nearby devices can connect.

Also, I would get rid of the requirement to "agree" with the terms before getting online. That just wastes the limited bandwidth. Put that fine print on the camping registration or admission ticket instead.

You could also add some mutiport switches so devices able to connect by Ethernet cable can do so without interfering with the wifi.