One thing to consider is the festival of Ramadan. This is a period of fasting for the locals which go on from sunrise to sunset. Staff will be less at hotels as they go home to be with family, however, resorts will be running. If you will be exploring the main island, remember to be dressed conservatively covering the chest, knees, shoulders, and elbows.
Within the resort, you are allowed to be dressed in what is comfortable for you. Alcohol is not allowed into the country, so do not pack any as it will be confiscated at the airport. But you can always enjoy your favourite wines and beers at the resort. You can also purchase alcohol from the Duty-Free on your way home.