Taking the lil one to BKK for vacations. I'm thinking of babywearing him instead of using a pram but not quite sure how to sort out the car seat issue when traveling by car. How did you all do it?

I think many taxis in Thailand might not have rear seat belts and baby car seat is not really common in their country. If you are booking your own car, you might really consider bringing along your car seat which you can check with the airline.