Hi There! Ok first let me start off by saying ...you are an awesome niece!!
I have a daughter with Down Syndrome she is 15 and she has been cruising for quite a while. Ive also been in travel over 20 years. We are booked on NCL in November so I only have experience with them via email so far. However, Carnival by far has had THE BEST accommodations for special needs so far. We are also out of CA, 45 min away from Long Beach. I would definitely start out with a 4 day. A little calmer than a 3 day. They will set everything up via email and be waiting for you at the port to personally escort your uncle and his party onto the ship. You'll be able to go straight to your room to settle in. I know this is important for us 🙂. Im not sure about post covid muster drills, but before, you were able to have a quiet private muster station room for your party. Royal Caribbean on the other hand,...we really had a terrible experience with them. No one was on the same page from the boarding process all the way through. The security pretty much drug us out of the cabin for the muster drill after several officers told us to stay put. It was a mess!!. Please let me know if you need any help or have any other questions.
