Upload & Sell: On
I've been over there several times. The most recent this past September to Laos and Thailand. Just be smart about what you do and how you do it and you'll be fine. Be mindful of things but don't be overly worried. I can't think of a single time where I ever felt threatened or worried.
I used a PacSafe strap on my camera and did keep it in pretty solid control. Carried what I needed in a variety of bags and pouches but most often in a small backpack. I did't use a "photo" backpack, but rather a basic common pack. Just minimize attention.
Over all, enjoy yourself, be respectful of people and take lots of great images.