So you are one of the noisy buggers on the bikes.
The main reason I fish there early season is that it is when many of the sea run trout enter the river. I have not managed to catch any yet but I would keep trying 
The south side of both rivers are normally fairly empty, especially once the whitebait season ends. 9 times out of 10 I would have the southern bank to myself while people are nearly shoulder to shoulder on the north bank.