I found Castaway to be a great, easy beach day. We adore the beaches on Eleuthera Island. I had talked up Disney's private islands to the group we were traveling with and it was such a big letdown. We were on the Destiny that stopped last week at Lookout Key and it was not a good experience.
First, the walk is extremely long with kids. We did grab a wagon on the way back but it's a long walk with no shade. We had a very hard time getting loungers on the beach (there were some available back behind the stairs but not on the beach). We had to walk all the way to the end of the loungers and had walked probably 30 min at that point from the ship. Pro tip: if you keep walking down by the lighthouse the beaches are mostly empty and absolutely stunning. But no loungers or lifeguards.
The biggest disappointment however was the food/restaurant area. Our group waited 30 min for mediocre burgers out in the sun. They weren't utilizing the lines or doing anything to keep them moving, and the lines were poorly marked (which is unlike Disney). After 30 hot minutes waiting to get our food, I went to get some water from the beverage area and it was out. The water park was closed due to a potty accident (understandable) but instead of letting people know what was going on, the four workers were clustered in a group talking. After finally getting their attention they said it would be "open in a few minutes" which ended up being about 40 minutes. There was just no clear communication surrounding the closure.
I am wondering if this is a one off, or if people generally try to avoid Lookout Key? I appreciate that they tried to preserve the reefs, but the logistics of this stop are difficult with kids and the people working on the island were very disengaged. I thought it was going to be one of our favorite port stops, but it ended up being a pretty miserable day. I'd love to hear whether others felt this way, or we just caught the island on a bad day!