My family of 6, 2 elderly and 2 very young kids will like to visit hainan for 7 days. i heard that sanya is very nice but its takes more than 3 hrs by car to go from haikou. will like to know more about boao, is it as nice as sanya? do u you have any tour guide to recommend or agency. do you think that staying in service apartment is cheaper? do you have any recommendation?? thanks so much for your advise.