We have 9 days in Thailand (after a river cruise in Viet Nam). We are looking at traveling to Hua Hin, Chaing Mai and Bangkok. Our question is whether to spend 4 nights in Chiang Mai and 3 nights in Hua HIn? Or should we spend 3 in Chiang Mai and 4 in Hua HIn? Both places sound so wonderful. Is there more to do in one place vs the other? Wish we had more time. Thank you for any suggestions.