Bac Lava: The river was really quite warm, it's got a very slow current but is fairly weed free, it was quite easy to swim upstream for a while and then drift on the current.
The getting in is fairly easy - just walk next to the river from the footpath and there is a small flat bit without many reeds on the meander indicated. Parking close by if you don't live within running/walking distance.
Seemed very clean and I checked the council map for any outfalls nearby (none for miles upstream).
Jade Someday: River very quite and remote, hard to access. Current was very very strong and swimmers should swim here with caution!