If you plan to visit Myanmar in Aug it's rainy season. Going places not that bad. There are highway buses, taxi, train and planes. Only thing is accommodation ( if you want 4 or 5 star hotels ) is very steep compared to Thailand. On the average US$ 250 per night. But you could find less costly and of course you can not expect much.

If you like temples and nature then Myanmar is for you. Do not expect fancy stuffs like places you find on Rachada Rd or Sukumvit here.