What were the three options Ralph considers to avoid being hunted?

From the text:

There were many things he could do. He could climb a tree; but that was putting all his eggs in one basket. If he were detected, they had nothing more difficult to do than wait.

If necessary, when the chase came too close, he could charge the cordon while it was still thin, burst through, and run back. But run back where?

A third idea would be to hide so well that the advancing line would pass without discovering him.