Auch! That is not a very good place to find a hotel. Kap Choeng, that is the closest city to Chong Chom border is not very filled with good places. There are some bad, but it would not be my choice. For me, there would only be two options.
First, could be to find a hotel in Prasat, which is a bit more far away from the border than Kap Choeng. In that case, I would chose Tong Paeka Hotel for about 750 a night. From there you can get someone from the bus station to drive you back and forth to the border.
My choice would fall on driving all the way to the border, though. Have done that a good amount of times before. They have big parking space, and it has never happened anything with the car. As long as you do not drive a Lambo, you should be fine. ????
Welcome to O´Smach