We live in the area and love Lake Anna. You said you will be coming in on 15/29 . You will exit onto Rte. 3 in Culpeper. At the end of the ramp, make a left turn and travel to the stop light where you will make a right turn. This is 522 south that will take you to the Lake Anna area. It's a bit of a hike so don't panic. Once you start crossing water you will soon see Dickinson's Store on your left. you Turn left at the store (208). Travel 8 miles, cross a bridge. At 601 turn left (Lawyers Road). Go 3 miles and the park will be on your left. There are some narrow roads but no bridges that will present any problems. Just take is slow when you get on the narrow roads and watch for deer! The campground is very nice and quiet. Enjoy your visit!