My coop/run is on a concrete slab and the wire is tough enough to keep out predators (in australia at least, nothing big here!)
My waterer lasts a week, normally I give my girls a 'daily ration' so the mice don't get fed too. But I have a big back up automatic feeder thing that will last them (and the mice) three days when I go away. I have little kids (10yearsish) in the street that love "the animal lady" aka me, so I ask them to check on my chickens every day, show them where the feed is etc. They just love that they get to pet the chickens every day!