According to this report Forsyth County saw the largest increase (5.9%) in visitor spending in 2008 of the large tourist destinations in North Carolina. And here are some interesting stats:

Visitor expenditures directly generated 190,500 jobs and nearly $4.2 billion in payroll income within North Carolina in 2008. Payroll increased 3.9 percent from 2007. Visitor spending in the state also directly generated close to $2.7 billion in tax revenue for federal, state and local governments in 2008, up 3.6 percent from 2007…

Mecklenburg County received more than $3.6 billion in domestic travelers' expenditures to lead all 100 of North Carolina's counties. Wake County ranked second with more than $1.5 billion, followed by Guilford County with close to $1.1 billion.