Where are you staying in Boone?
Great riding on the Blue Ridge Parkway. Easy to get to from Boone.
Lots and lots of rolling hills and beautiful scenery.
also email or call Boone Bike & Touring (http://www.boonebike.com) or Magic Cycles (http://www.magiccycles.com/index.html). They are both the “local” bike shops and might have some group rides on the days your there.
I lived in Boone for about 6 years and know the place very well. Lemme know what you up for and I can give you the right direction to head.