I have travellled in South America but not in Central Asia. In my limited experience, there are no big differences between good quality films as to travel-worthiness. Heat, dust and humidity will do the same to more or less every emulsion. Differences, if any, are marginal.
My experience is with FP4+, Tri-X and XP2 in BW, and with Fuji Sensia 100 in slide films. I can also vouch for Kodak Gold 100 and Fuji Superia 400 in color neg.
Depending where and how you are travelling, it may be possible to have chromogenic film such as XP2 or 400 CN developed locally or even transferred to CD. It helps to have some film developed locally from time to time, to check if everything is going well.
The "best" type of film depends on your preferences, your subjects, your equipment and the final use you plan for the photos. It is simpler if you stick to one type of film or at least to a single ISO, in order to minimize the chance of errors and to simplify processing, later on. Also, you should choose a type of film that you are familiar with and used to processing, if you develop your BW yourself.
A few months of waiting for development should not affect your images, unless film is exposed to radiation, heat or humidity. Keep unused film in the original canisters. Reuse the canisters for exposed film (cut the leader, so you don't confuse them with fresh rolls!), and keep exposed film in a plastic, closed bag, as far away from heat as you can.