Airforce 1 has landed in Canberra a number of times and I seem to remember them using stairs when stepping off the plane.
Qantas uses Canberra as an "Emergency" alternate airport for their B747's but it is a main destination for their B737's (and B767's in the recent past).
They also use Williamtown Airbase (a joint Civil/Military airport) which serves the city of Newcastle, about 75 nm north of Sydney. It's a B747 "Emergency" alternate as well but regularly takes B717's (and FA-18's).