Focus on hyphens: Which of the following sentences is punctuated correctly?

Some of the healthiest-venus flytrap populations include tens of thousands of plants living in well-protected spots, including the Fort-Bragg military base area.Some of the healthiest venus flytrap populations include tens of thousands of plants living in well protected spots, including the Fort-Bragg military base area.Some of the healthiest venus flytrap populations include tens of thousands of plants living in well protected spots, including the Fort Bragg military base area.Some of the healthiest venus flytrap populations include tens of thousands of plants living in well-protected spots, including the Fort Bragg military base area.