
Hi Paul,
You're right, Avons are designed to be fished similar to stick floats. I don't bother threadling the line through the hole but fish them double rubber styley.
Your river probably has a fair bit of water pushing through at moment. In these conditions your Avons would probably be better than a stick. Bulk the shot about 18-24ins from hook with just one shot beneath the float to act as a depth gauge if the float slips up the line. Maybe a couple of No.4s below the bulk will really get that hook close to the bottom.
You could also do a search in the technique section at the top of this page for 'First Class Fishing' (I think thats what the series is called) You will get more in depth information there.
Hope this helps, Barry