I am planning on going with Gap 360 on their thailand, vietnam and china 77 day adventure tour. Has anyone been with them previously? I am booking a 2018 tour date soon, so I have plenty of time to save. However, I was wondering how much people who have done something similar took for spending money? I obviously want to do the whole trip as cheap as possible but want to be able to make the most of all the optional excursions were available to make the most of my time.