2 of us are going 3 weeks this summer to Thailand (from mid August until 5th September). We are planning to fly to Bangkok,stay there a couple of days and after start a little tour through the country. We'd thought of spending 5-6 days to the northern part (Chiang Mai) and then travel to the southeast coast 2 weeks.
Is it a good idea? How should we preapre the journey (hotels,transport, money...)? Should we change and visit another part?