Try some of the options listed in the Kiosk page? I don't have first hand experience with offline html documents on a iPad, but what you're looking for is usually referred to as 'offline kiosk mode' -- and since Hype is a HTML document, any Kiosk app that supports HTML will show Hype documents correctly. (As long as you don't use any external web fonts).
Might be worth checking out the offline functionality of 'Documents' -- this page has more info: Documents internal web browser | Documents Knowledge Base