Mutianyu overnight

I would like to take my parents overnight at Mutianyu. I would prefer this as not quite as many tourists as Badaling but it still in fairly good condition as my parents are older and not as steady on their feet. Have you heard any comments about the quality of the guesthouses at the foot of Mutianyu - would they have their own toilet/shower for each room. We are not so worried about the fancy stuff just privacy for showering and toilets really. Are these the guesthouses with terraces looking onto the wall - i was there many years ago but i cannot remember if i was at Mutianyu or Jinshanling or Simatei (which i think is closed at the moment). I wish i had photos of the guesthouses that i could show to check which is the right place.

Peter