IOS – How to airplane mode interfere with WiFi

Using the iPad camera connector with the USB port seems to work with certain items (headsets, etc.) that aren't cameras, leading me to believe that there is a full USB hardware implementation in there but there simply aren't any drivers. If this is true, you could get a USB Ethernet dongle, write iPad drivers for it in your camera-viewing app, and use Ethernet to connect to your cameras. I doubt that would get on the App Store, but that's not a problem, given that you will be using the Enterprise distribution method. This might also preclude charging the iPad while it is connected, so you may have to design and manufacture your own power-and-ethernet dongle.

If you have checked both the user keychain and the system keychain for old passwords, we're left with obscure guesses.

Two things come immediately to mind (from the obscure side).

1. Your mac will join any base station with that SSID. I have seen people literally setting up a second router in busy coffee shops - you have to hold the option key and make note of the mac address you have connected to and see it change to catch this.
2. If your wifi connects to the router wifi, it doesn't mean the dhcp server has any more addresses to lease. You will need the owner to reset or power cycle the router to see if the leases are all out and unexpired. You basicall have a great pipe connecting you to the main, but no water is flowing to you until you get a lease.