We have plastic totes that all of the equipment goes in. One holds the cooking stuff, another the tent, etc. That way when we get home, it goes from the trailer into the storage shed quick and easy. No unpacking or anything.
Our tent has a screened in area on the front which makes it great to sit in when the skeeters are out but we also have a screened in shelter that we put up to cover the picnic table so we can eat without having our veins sucked dry in the event the skeeters show up.
When I camped on the beach for days on end, I'd have dry ice in the bottom of my cooler with regular ice on top. Then I'd bury the cooler in the sand up to about 2" below the rim. Periodically I'd wet the sand around the cooler.
The ice would keep everything ice cold for 4 or 5 days with no problems.