hmm, well you can always stuff it in your pants, although this is kinda weird, it might just work, they don't frisk you before you go on a roller coaster...
disassemble it and stick it in your pockets. It should be secure.
Another way is to get a permit from the park that states they have allowed you t film the ride. Call Guest Relations for more information.
there are many ways to sneak a camera but you should actually think about how you will keep your hands on the camera. Even a wrist strap isn't secure enough to keep from the camera flying away
where a hoodey and keep in the big pocket of course u might be hot while your in line but...
stick it up your butt