The solution of course was HotspotSystem. At the splash page users are required to "agree" to our terms and conditions before they are connected to the internet. Also, their time is limited to 1 hr and the bandwidth is limited to 4Mbs download and 500Kbs upload (even though our connection is capable of 50Mbs download and 5Mbs upload).
To spread our internet connection across the two campuses we use 4 buffalo high powered airstations (WHR-HP-GN-r). We also use two Luxul high gain (+/-15Db) omnidirectional antennas and two Luxul high gain (+/-20Db) directional antennas to bridge the two sites.
The first router is connected to an omni antenna (to give signal to our office and first campus) and daisy chained to the second router, which is connected to a directional antenna. that directional antenna sprays the signal about 1/4 mile to the third router configured as a repeater to catch the signal also using a directional antenna. the third router is then daisy chained to the fourth router that is connected to the second omni antenna that spreads the signal around the other campus. Only the first router (using DDWRT firmware) needs to be configured to use HotspotSystem, since the other 3 routers pass through it. So now all of our guests are managed through HotspotSystem's hotspot, and share our internet connection from our office.
Edited by dan4governor, 02 December 2011 - 12:45 AM.