There are some films and rides with no photography but they will warn you when it's not ok to video tape. (and listen close, they will list what is not allowed and if you don't hear video taping, it's ok).
My daugther just used a gopro in sept (after the selfie ban) and she had a "the handler". It's a floating handle with a strap. They questioned it a few times but always allowed it in. It's really comfortable to hold while having your hand on any handles or things for the rides and the wrist strap ensured if it came out of your hand it stayed attached to your wrist.