There's City Oasis Guesthouse (Ngau Au Village), which is about a 10-minute taxi drive from the airport. But then that means dealing with Lantau taxis. Used to live a little outside of Tung Chung and the taxis are a pain to get, and not just at busier times. Don't know the times you are arriving/departing so can't comment on taking a bus to/from the guesthouse, but it would likely be via Tung Chung bus station, which actually might be walkable(?).