Things to bring with
It depends on which activity you do:
Kayaking: camera, phone, bottle of water, sun cream, cap, towel, sun glasses, flip flop, new clothes to change (you may get wet).
Row boat: camera, phone, bottle of water, sun cream, cap, sun glasses, towel.
Climbing, hiking: camera, phone, bottle of water, sun cream, cap, sun glasses, shoes, first aid kit.
Cash is needed in any situations. You may need to use cash to buy water, souvenier, food and especially TIP. Tip is not required but we strongly recommend you should give some to encourage servers. Common tips in Vietnam (Tour guide: 2USD/day/person, driver: 1USD/day/person, rower: 1USD/person – These are minimum tips you should give).