Camera and render

Its time to place the camera into the scene. I've put my camera in the centre with it rotating around the scene as a turnaround. However when scroll through the timeline or even create a playblast Maya crashes :( I'm not sure how to fix this at this stage so I've just moved onto rendering out my images:

Here's a clearish render of my scene - I removed the skybox for rendering because it was coming through all of my images and I wasn't sure how to turn it off. I will place the sky in the composite of the video so the trees and grass are being rendered out in their own layers at this stage.