Stormy, the Avon descent is a race in Western Australia.It's promoted as the greatest white water event in the world.Goggle it and have a look.It has powerboats and paddle craft starting up in the wheatbelt at Northam and finishing in Perth.It's 135 kms long over 2 days ,about 60 kms of flat/flowing river, 30 kms of dense tea tree thickets,and about 50 kms of rapids. It's held in winter when the Avon river (becomes the Swan river) is in flood,and drops the whole way down the Darling scarp to the coastal plain.So no one boat is ideal for it ,thats why I paddle a sea kayak ,it has a bit of speed,abit of comfort and not too bad in the tea trees as the upswept bow is good for jumping logs and breaking through the trees when you go up the wrong channel and some of the rapids can be heavy but again O.K. in a sea kayak.To train , we paddle on the Murray river near Mandurah ,as in a lot of ways the rivers are similar ,but the lower Murray run has some heavy rapids that I haven't paddled ,grade 4 ,we paddle the middle murray grade 3 in the sea kayaks but I thnk I'll stick to the play boat for the lower run .That is why I said I'd like to paddle the lower run and survive.A mate of mine who is a level 5 white water instructor has paddled the lower run and said its a world class bit of water.