tony,
in any case of secured guest WLAN, some one need to handout a guest pass or Key however that is a trouble then you can guest WLAN with no authentication. Here you get captive portal BUT guest user can accept terms without entering guest pass. this is easy. see the image
![Image_ images_messages_5f91c428135b77e2479905f6_4b3602e51cbe898e23e163f1c52a934b_RackMultipart20160425409251l9t-d9445519-fbf4-4cf2-9549-c3d720d187da-1318495984.png1461559049 Image_ images_messages_5f91c428135b77e2479905f6_4b3602e51cbe898e23e163f1c52a934b_RackMultipart20160425409251l9t-d9445519-fbf4-4cf2-9549-c3d720d187da-1318495984.png1461559049](/t5/image/serverpage/image-id/252i02EBD2DA5B61383F/image-size/large?v=v2&px=999)