A couple of years ago (2008) flew out to the Horizontal waterfalls from Derby (WA).
I was quite suprised to  find this old Beaver not only flying, but still certified to carry paying passengers. A minimum of 40 years old if it's a day.
 
https://www.aulro.com/afvb/images/im...10/02/1112.jpg
 
Certainly a mixture of the old and the new at Derby.
 
1. De Havilland Beaver
2. Gippsland Aviation GA8 with cargo pod
3. Cessna 206 ?
 
https://www.aulro.com/afvb/images/im...10/02/1113.jpg
 
Though we flew out to the Horizontal falls in this, pilot "Mal" was an ex-Vietnam era pilot and very professional.
 
https://www.aulro.com/afvb/images/im...10/02/1114.jpg
 
Cessna Caravan Seaplane.
 
The floats are a bit like icebergs, 2/3 under the water. Must make it hard to take off with all that drag. Remember a bloke I used to work with was a engineer in the RAAF during WWII said they had strap on "rockets" which they could use to help take off. No turbo props in those days I suppose.
 
Deano