It's always interesting to see how other places work - it's too easy to think that no-one else has the same problems that we do and often they have a different solution, which may or may not work for our own unit.
We (UK, regional) have to have an inspection before opening, again at first light and then again before nightfall plus at set intervals during precipitation or low vis ops. Generally this fits around movements, but we don't sterilise the runway. Runway state has to go on the ATIS and can't be changed without an official report from Aerodrome Ops.