The fare from the Northern Bus Station costs 190 baht, and 20 kg of luggage is included in the price. The bus is comfortable and spacious. I am attaching a photo. The ticket was purchased with the help of an interpreter 3 days before departure.
English is spoken at the ticket offices.
Tickets for the following days are reserved until 17.30. Tickets for today are sold while buses are running. The queues are small.
The station is large, outdoors, under a roof with a fan. There is a small shop and many cafe shops. Lots of waiting places, tables. The toilet is multi-bedded, costs 3 baht.
The departure time and the bus number are written on the ticket and on the large scoreboard. Boarding starts in 10 minutes, and is announced in Thai. Departure according to the schedule.
We were not charged for luggage, and those who had large suitcases were charged.
The bus is clean, comfortable, the air conditioning is working, but you can do less overhead.
Everything is very convenient and intuitive. We arrived and got to Bangkok without any problems. I don't know what kind of iq you need to have in order not to figure it out