Haha! The boat rentals are very good at telling you that your boat can pass under PH bridge, less good at telling you that only at low tide, on certain tide cycles and there may well be a queue....
They also don't tell you that mud anchors don't work on Salhouse broad and that after 8 cans of...
I don't think there's anywhere in the south where you could spend a week, with no locks. As previously mentioned the Broads are probably your only option, it's very easy there but the moorings can be very busy especially at the pubs close to the rivers. If you're doing it for a week, and...