Thanks for the shout out.
On our B2B we did not have to pack, nor did anyone suggest we should. I suppose we could have if we had wanted to be extra cautious but we elected not to as it's really one of the highlights of doing a B2B for me. The testing process for the second cruise was much faster because it was just B2B passengers and vendors. It took about 10 minutes for us to get our results. If you are on early dining I would talk to your servers the night before and see if you could do the second seating breakfast so you don't have to get up so early if you want to eat in the dining room. You can also order coffee from room service the night before and it should still be warm the next morning if you want coffee in your cabin. Cove and French Quarter Lounge were open on the Wonder to get complimentary coffee after you got back on. I asked our stateroom host what time we could get back into the cabin and he said around noon but I think the cabin would have been ready earlier if we had tried it. All of the information was on the app rather than them giving you documents, the only thing we got were stickers showing we were B2B. The app didn't say to have your port arrival form though, and I didn't take ours with us, but the process would have been much smoother if I had it.