We stayed 2 nights after catching buses to Chungju from Sokcho and then the number 240 from Chungju to Suanbo. The bus dropped us off at a Minimart in the main street. The cashier there showed us where to find the Tourist Info office where both English and Japanese speakers were anxious to help. They showed us the "ten minute" walk to the hotel. We are keen hikers but this ten minutes with bags was more like a sweaty, puffy thirty minutes.
Suanbo Park reception were great and the room excellent; lovely setting, great views over town.
We ate one of the local specialties in town, rabbit. It was delicious but way to much for the two of us. I understand the dish is sold by the number of rabbits you want rather than the number of people wanting to eat ($50 for ours). We needed another two helpers.
But regarding the hotel, we chose the western style room with beds, again a bit hard which seems to be typical in Korea. We've tried the ondol beds before and are over it. Camping is more comfortable than ondol.
Best tip for this trip: stop at the tourist info office in Chungju. Even though she had zero English she showed us where to get the Suanbo bus and gave us a map of Suanbo. Without the latter in hand it might have been hard to get from the minimart to the Tourist Info office there.