It’s a beehive of aviation activity at Oshkosh. With so many things to see, there is danger of sensory overload, but for the enthusiasts who flock here annually, that’s just fine. They walk around with totes and backpacks filled with information packets and parts from the Aeromart. And when the legs get tired, they lay down on the grass and look to the skies. There is always something going on up there.