Well, I experimented. I decided I would only float fish today and had to chase the fish around - some came to the whip, some on a stick line about 2 rod lengths out, and most at about 4-5 rod lengths on the edge of the main flow (which is where I expected them).
I was never able to get more than 2 or 3 fish in a burst, but ended up with dace, bleak, roach, gudgeon and perch for a couple of pounds. I daresay I would have had more on the feeder from the peg I was on.
There was a match on the same pegs as us next week (7-27), and chatting to a couple of them, there have been a few bream caught, apparently someone has had a decent perch (3-4lb) and then a similar story with the silvers - the roach are definitely not here yet - although unsurprisingly, the float fishing was better nearer the outflow (pegs in the 20s).
60g apparently is holding fine for the feeder - I was fishing an 8xNo4 stick and pinging it out.
If you don't know the stretch, this is how far you have to walk (and you park on the grass, so it really is next to where you fish on every single peg).
The bank can be a bit steep, but not too bad. If you are planning to fish the feeder, you can probably do so from the bank in every swim. If you want to float fish, being able to put your box/feet in the edge of the water makes it a bit easier, but it's not vital. This is how I was set up today.