Be aware that the overwhelming majority of the world's anti-trans violence occurs in Latin America, mostly in Brazil. Some countries are much friendlier than others, but as an example Brazil actually has the highest rate of transphobic murders in the entire world. It's a good idea to have some idea of local attitudes before you blunder into a potentially dangerous situation.
I'd recommend you thoroughly research your destination countries so that you can keep yourself safe. Many of these countries have very active LGBT organisations that are working hard to promote our rights and make things safer for us; they'd probably be able to give you some good advice about how to travel safely in their local area. Revealing your status (or having it revealed for you, e.g. through your documentation, or by being clocked, or when hooking up, or if you need medical attention) would probably not be a smart move in certain areas.