Moderate 2a2
Reply to 11b
>>2a1
Yes. The longer you are on the road the greater the probability something will go awry. It might cost more but train is the way to go. I went to Cox Bazar when I was 10. From a Dhaka to a relatives place in Feni, and then from Feni to Cox Bazar. On the way back, we bused our way to CTG city and then took a train back. The reverse of the return trip, I suspect, might be optimal for your trip.