Travelling Vietnam is convenient because of the Open Tour System. It is a System where you book your bus ticket from a travel agency (I suggest to find the real Sinh Cafe to avoid scam) that covers all the tourist destination, packages up to 7 town destinations in different price range, depending on the package.
You can stop at each town and stay for how long you want, just confirm your next trip a day before to their major office. They have major offices at each towns and they are usually located at the town center, which means, it’s convenient for any travellers to get the cheap guesthouse location or the backpackers area. They usually drop you off in front of their office.
Open Tour is highly suggested for tourists travelling in a time frame, yet for those travelling indefinitely it is better to get the ticket separately (some towns offer cheaper price). Open Tour is also available in Sleeper bus type and Seating, if you will be travelling a long distance like 6hour trip or so, Sleeper bus is highly recommended. It has toilet in it, making it convenient to everyone, blankets, and free small bottle of water.
Complete Package is 680,000 VND ($41 USD). Some Sinh Cafes will charge lower but it is a scam, specially in Hanoi, there are thousands of Sinh Cafes everywhere but be sure to book and confirm your own from the real one.
Here’s the list of the real Sinh Cafe Offices in each town:
1.SAIGON Sinh Office I (Head Office)
248 De Tham St., Dist. 1, HCMC
Sinh Cafe II
24-26 Pho Duc Chinh St., Dist.1, HCMC
2.DA LAT 4A Bui Thi Xuan St., Da Lat
3.MUI NE 144 Nguyen Dinh Chieu St.,
Ham Tien, Mui Ne, Phan Thiet
4.NHA TRANG 2A Biet Thu St., Nha Trang
54/I Nguyen Thien Thuat St.,Nha Trang
5.HOI AN 587 Hai Ba Trung St., Hoi An
6.DA NANG 154 Bach Dang St., Da Nang
7.HUE Kios 4, 12 Huong Vuong St., Hue
8.HANOI 52 Luong Ngoc Quyen St., Hanoi
64 Tran Nhat Duat St., Hanoi