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Can you tell me if it’s better to stick with bottled water on Grand Cayman...or if the tap water is okay?? Thanks again for all the useful information.
You asked about the drinking water on Grand Cayman. It has a nice taste and it is safe and okay to drink. Some people prefer bottled water wherever they go, but you don't have to worry about food or water contamination in Cayman.
Cayman is a first world country and tourism is not it's only industry; it's is a major financial and banking center.
The roads are good and the healthcare systems are modern, mosquito-abatement is rigorously practiced so malaria, dengue, chikungunya, and zika are not issues of concern. There are modern grocery stores and the crime rates are low. The people are friendly and speak English - so what's not to like?
Cayman is expensive but since you are doing an Eat, Sleep, and Dive trip at the Cobalt Coast during the low season, most of your expenses are controlled and will be paid up front.
The Seven Mile Beach area is highly developed and that isn't always popular with people looking for a laid-back island vibe, but it does mean that there are excellent restaurants, shopping, and attractions available - which is nice for non-divers traveling with divers. George Town is a major cruise ship port and that is also not so popular with folks looking for a quiet getaway - but there are remote areas of the island that are much less developed (like the northern West Bay area where you will be staying) so people have the opportunity to enjoy the amenities and then slip away to the quiet side if they wish.
Seven mile beach is a beautiful world-class beach. It can get crowded in front of the big hotels, especially during the high season, and also at cruise passenger venues like the Public Beach and the Royal Palms. But there are a lot of condos and rental properties along 7MB that aren't crowded, but they aren't cheap either.
There can be heavy traffic on GC, especially around George Town and other highly populated areas during rush hours and when multiple cruise ships are in port. When we are planning any excursions to those areas we check the cruise ship schedule (link below) and try to avoid the rush hours.
https://www.caymanport.com/ship-schedules/
Cayman is a conservative country and that's not always people want when looking for a vacation destination. There are venues with music and drinks and pleasant places to gather and have fun but it's not really a "party town" atmosphere. There is no nude or topless sunbathing or swimming, no gambling, no live music on Sundays, and it used to be that stores could not sell liquor on Sundays, but that has eased up a bit in recent years.
Cayman offers very good Caribbean diving that is close to shore and there are many high-quality dive ops working on Grand Cayman. And if you want nice diving in a quiet, rural destination - check out the sister islands of Cayman Brac and Little Cayman - where there's not much to do but relax, eat, dive, and enjoy nature!
I hope that you have a great trip!