First of all we saw Barty Crouch (who was dressed as though he had stepped out of a Dickens novel), he was friendly and was looking at the crowd and liked the fans attention.
We noticed that there was a remote control that someone was holding and expected to see some animatronics animal or puppet. After looking around we then saw Mad-Eye Moody (Brendan Gleesan, dressed similar to how Hagrid would be dressed and quickly realised that the remote control was for his Mad eye). He was in makeup and cloaked in security and although we could easily see his face, eye patch and eye there was so much security that it was impossible to get a clear photo of him. He didn’t really look at the fans at all and didn’t seem to be bothered that people were here to support him. He gave no interaction to the waiting crowd and didn’t even look or smile.
The second set was another boat jetty, this had about five canoes, and a life buoy, and we didn’t see the filming of this one. The third filming was of a big crowd (about 100 extras) of Hogwart school kids with Mad-Eye Moody walking in the middle of the crowd.