Just to add our experience, we skipped the long line in the terminal & decided to register at the club. During open house, before the muster drill, it was insanely crowded. Registration was in the back in the lab. There were only 2 CM handling registration & it seemed that no one had registered on line. Everyone had questions and was filling out a paper form.
I waited almost 30 minutes before they had to send us out for the muster drill. Afterwards, we did registration for Edge & Vibe, quick and easy. We then headed back to Oceaneers. They sent us to the port adventures desk. There, they pulled up our info & had armbands on my kids in less than 3 minutes.
Hopefully our adventure saves someone a few minutes. My kids were not happy that they had to wait so long & wanted to explore during open house. If I had know that 30 minute wait would be for naught, I would have just let them explore & headed to the port adventure desk later.