Vang Vieng overall is a relatively safe destination for solo female travelers. Its crime rate is generally low. However, a level of caution should still be practiced, particularly at night or in less crowded areas. The locals are generally warm and friendly, but it's important to respect their customs and traditions. There may be some issues with language barriers as not all locals speak English. Health safety is also a concern with occasional cases of dengue fever and malaria, so proper precautions should be taken.