Note that it is also possible to camp in the Khao Yai national park (they provide the equipment) or to rent bungalows from the Visitor's Center.
Otherwise, you can use this hotel room price comparator to find the booking site that offers the cheapest price for a room in a same hotel: Hotelscombined.
We have been waiting for it for months, hoping it will happen on July 1, but it will finally be October 1, 2022, when Thailand will lift the last COVID restrictions to enter the country. From this date, it will no longer be necessary to show...