A little over a decade ago I spent 3 months on Eleuthera while working on a movie. (Let's be honest it was a B-Movie at best, and made no sense whatsoever, but a paycheck and 3 months on an island none the less.) The production company chose Eleuthera because the island was nearly empty all the time. (118 miles long with 119 churches/places of worship as the tourism minister informed us during the initial scouting trip.) But most of the island's population is congregated around the 4 main towns: Spanish Wells/Harbor Island (Northern most points of Eleuthera), Governor's Harbour (The island's capital in the middle of the land mass), and Rock Sound (Southern end of the island.) When we went out on the beaches at four separate locations, we would never see another human apart from our production crew for the entire day along the entire beach literally as far as you could see in both directions.
BTW Princess Cay is not a separate island, it is just a port on the leeward/Western side of the island about 2.3 miles direct distance from
Lighthouse Point. Their ships anchor off-shore and ferry the passengers to a smaller dock in the center. Look here on google earth: 24°38'11.54"N 76°10'28.34"W
If they are willing to spend the money, and if we take
Castaway Cay as an example that Disney is willing to spend money, there is always a way to develop the land while preserving both Nature and History. In fact, the cultural education and archaeological excavations of the slave plantations at Bannermans Town (3.8 miles away) & Millars (4.9 miles) could be funded by Disney, use educational grants from US, Bahamian, and UK universities to provide competent scientific staff, and be made to allow tourism with passenger excursion fees similar to those that explore the Mayan ruins, or what the National Park Service has in Jamestown, Virginia.
(Found this Image on Google from the Jamestown-Yorktown Foundation. Not mine)
Visitors can be granted limited access to the site and a cultural education center can be constructed and filled with the dig site findings to tell the stories of the history of the Bahamas. Therefore, Disney and the local Bahamian government can protect cultural and historical elements while generating funds to further research and learning. But you have to remember that these sites are not within the boundaries of the area Disney is looking to develop.
Another item listed on the websites who are against the idea, is the influx of ship passengers taking away beach access. While I admit it has been 11 years since my time on the island, but absolutely no one ever complained about too many people on the beach. Again, the production chose the island for it's deserted feel. Maybe more and more people have started visiting the island over the past decade, and I could be wrong in my opinion based on my past experience, but adding 2-4 days of people to an area for 6-10 hours is not going to affect the lives of the locals to the point where they won't find a place of secluded beauty for their day at the beach. I dove numerous locations around the island scouting for sites as I was doing the underwater cinematography for the movie. I don't remember one time over the 3 months ever seeing a local on the beach who wasn't working (fishing, dock work, etc.) I was looking for beautiful reef structures, abundant sea life congregations, etc. I found these all easily just within the area of Governor's Harbour (Cupids Cay) and off the coast of South Palmetto Point. In fact, nearly every where I stepped into the water, within a few yards I found something interesting to film.
As a scuba diver I do understand the desire to protect all reefs from destruction. No one wants to see anything like the dead sections of the Great Barrier Reef befall any other place on Earth. But what I do know is that scuba activities on Disney Cruises are one of the least booked activities. This is one of the only ways to get to the depths where the delicate underwater ecosystem would be affected. Surface swimmers and snorklers have extremely limited access to the depths of the reefs where significant damage could occur. Not many people can hold their breath for more than 45 seconds and dive below 12-15ft. Solution: Completely quarantine any access to Big Pond to protect the Stromatolites and limit the area of snorkeling and Scuba (if even offered) in the same way as Castaway Cay.
I can say this though, there were a bunch of other interesting things to do on the island besides sitting on the beach. There were caves that could be explored with bats and other creatures, there is an abandoned US Navy SOSUS base just north of Governor's Harbour that is pretty cool to check out, but kinda risky for Disney tours I would think. Deep sea fishing charters could be conducted as they are in other parts of the island. (On Fridays some of the locals that were working on the film and I would go out and free dive for conch. I took photos while they did the actual "fishing" since I believe it was illegal to retrieve sea life with scuba equipment. Every Friday night the entire town would come to the beach at Cupids Cay for a fish fry party.) There are a few spots that you can go cliff diving, some as low as 15-20ft, some as high as 80 ft. (We spent nearly an entire day launching a stuntman off the 80ft cliff. I think he did it like 30 times.) But access to all of these things is under developed. There are no safe walk ways. It is all raw untouched nature. The volcanic rock that makes up most of the reefs and shoreline would tear up you sandals and shoes, just imagine if it were your bare feet. Furthermore, the ability to get from the South side of the island to the North, let's say to explore the caves, would take 2-3 hours of driving. Most of the road system there was only two lanes, and while there is a "suggested" speed limit of I think 45MPH, driving at highway speeds is quite dangerous due to the conditions of the roads themselves. In reality you would need to take a bus to the Rock Sound "airport" and hop a puddle jumper flight in a single or twin prop driven plane to the North Eleuthera or Spanish Wells airports to get there and back before the ship sets sail.
If anybody could develop the area responsibly it would be Disney. And if it were offered on my cruise itinerary I would get off the ship and enjoy it. I would travel the island just to reminisce. I think with the economic and supply infrastructure already set up on the island, the location may be even better than Castaway Cay.