You definitely, can not take your Gopro on the dive itself. You can however take it with you and film any of the "onstage" parts of the tour(which is actually very little). Once "backstage", it will have to be put away. Other than your bathing suit, you may bring your own mask and a dive watch/computer. I brought my D9. Any jewelry or small items that can potentially come off, can not be worn. We were told of several instances in the past where the aquarium inhabitants have swallowed small items off the bottom thinking they were food. Not all the outcomes were favorable. As mentioned, a 15 minute or so edited video is made by Disney cm's and is available for purchase for $35. Also, there will be an opportunity, just before you head to the top of the aquarium for family to take pictures at the viewing windows. And of course they can take video from there of you during the dive.