The island sounds like what you are looking for - it's a place we would feel comfortable with for our daughter to visit solo. Recommend you check out Caribbean Villas Hotel. It is only 10 rooms/suites on 3 acres of land with wooded bird sanctuary that has lots of wildlife and flowers. The long-time staff are all local, love their guests and treat everyone as friends. 12-15 minute walk to town. Nightime security. Free bikes, hot tubs, hammocks, long pier with swimming & snorkeling area. They accept no commissions from guides or tour companies, so you get objective excursion recommendations and in some cases cheaper prices. Hotel accommodations are priced for most budgets. Wherever you stay, we think you will have a great time. Enjoy!