I realize this is a revived old thread but I'll put my comment here in case anyone finds this via Google in the future:
Thailand is one of the easiest countries in the world to tour in. There is a big tourism industry and you can find guest houses everywhere. The country is densely populated and the distance between towns is short so you will never be caught out overnight. If you are camping, you can pitch a tent anywhere and nobody will bother you. Costs are affordable and you can live a long time on a limited budget. People are friendly and you can usually find people who speak a bit of English.
I toured in Myanmar in 2016. It was during the brief period when the country was peaceful. It was a wonderful experience and I enjoyed it much more than Thailand. The country is underdeveloped and the conditions are quite difficult, so you should be an experienced traveler and cyclist to attempt a tour there. Parts are pretty much unavailable outside of Yangon, so you need to be mechanically self sufficient. The roads are terrible outside the central part of the country. Sometimes the roads are not even gravel, you are basically riding on small boulders. It rains everyday and everything turns into mud which sticks to your wheels and clogs your fenders. After the first week my body was trashed. It was still a good experience to tour there, just make sure you go in with the correct mindset. And again, don't do it as your first tour.
Foreigners are only supposed to stay in certain accredited hotels. These are priced higher than the local hotels (although still inexpensive by western standards), and you must pay by cash US dollars. So make sure you bring enough cash into the country. I mostly camped during my tour.
Myanmar doesn't get many tourists and the locals will treat you like a normal person instead of a cash machine. It was a good change after Thailand. The people were very friendly and the scenery was amazing. I also enjoyed visiting their cultural and historical sites greatly.
As of today (2022) it is not possible to tour in Myanmar. Last I checked they were not allowing tourists at all.