I would like my hotspot users to complete a simple survey before they are allowed to surf the web freely. The survey would be only a few fields to gather some data and a "submit" button. The result of the survey would need to be emailed to a fixed email address. Is this possible using only the MT? Do I need to host web pages elsewhere?

you probably gonna need external hosting, i´ve done something similar , i´ve created a link in the login page, when you click the link you are sent to a page asking an email address, an user and a password, and something esle, then i get their info in a email message, so i create that user in the hotspot and then i send the user the info to get connected to the hotspot, you can make some questions obligatory