If you can afford 4-5 days time, consider it as a special trip, an extended trip.
3 days 2 nights trips to the Sundarbans considered as a basic trip to the Sundarbans. It has a little bit of everything; A glimpse of the forest and it’s extra ordinary wildlife, a bit of adventure and exploration, astounding eating experience and a little bit of time for absolute relaxation and contemplation.
The Audience/Followers of Dexter used to see Dexter covered in blood. But here is something for a change- Dexter on Mud!.