If you are not concerned about visiting 99% of other world and "western" countries with various political and governental inclanations, then just don't worry and go.
It is like Thailand and Malaysia used to be 30-40 years ago. No ATMs, no mobiles (governement has secluded network not accessible with our mobiles), but rikshas and old post-war American buses still running. You can find all minimum modern things (hot water and aircon) if you need it.
We did similar itenary 2 years ago ^ ^ ^ and dream to go back again soon. Great people (there are touts but they exist in every Asian country anyway) and lots of history/monuments/temples!
Take Lonely Planet or RTFF and you will find your way there