We had a situation at DL (same rules) where my DH, my 1 y/o and myself got in to an IASW boat with my 13 y/o, 11 y/o and 6 y/o in the row behind. We didn't even think about it since we were all "together". The CM instantly stopped our boat, asked the oldest's age (13) and the 6 and said they couldn't ride together, even though they were directly behind us (both middle rows). So we pulled the 6 y/o up with us and all was fine. She did say she would have likely allowed it if we had been in the row behind the 6 y/o. Truly just an oversight by us, we assumed that if we were all "together" it wouldn't be an issue. So 7D could be an issue. But I think the Safari has plenty of space for a father and 2 small children? It has been a couple years since we were on it so I can't exactly remember the seats, but I wouldn't think it would be a problem.