Ben Tre’s primary bus station is about 4 kilometres out of town, to the north on QL 60, though larger bus companies like Futabus have offices scattered around and generally closer to town. While you can get a bus to most destinations from the main bus station, check with your guesthouse and they may recommend a closer private company which may make more sense from a convenience point of view.
Sample destinations and prices from Ben Tre bus station to elsewhere include (price varies somewhat depending on the bus company and type of bus:
Camau: 113,000–150,000 dong
Can Tho: 70,000–80,000 dong
Da Lat: 194,000 dong
Ha Tien: 120,000–140,000 dong
Ho Chi Minh City: 50,000–70,000 dong
Phan Thiet: 106,000–129,000 dong
Quang Ngai: 370,000 dong
Tay Ninh: 84,000–100,000 dong
Tra Vinh: 68,000–70,000 dong
Vung Tau: 84,000–95,000 dong
Ben Tre town is small enough that it is a comfortable town just to walk around in, but if you are out in one of the homestays, then you’ll be wanting a bicycle or motorbike, both of which are generally available for hire (or in the case of bicycles, sometimes for free) from most homestays.