I do this drive in my sleep..40 is easy then you get on 440 for all of two miles to 64 east..straight shot to Williamston NC then 64 turns to a four lane non interstate into Plymouth, then back to a super highway until Columbia then single lane each direction (plenty of room) until Manteo..
In Rodanthe KOA and Hatteras next door to each other..both great for kids..in Wanchese ..next to Manteo...is the Refuge which is where we lived while our stick/brick was being finished(quiet has pool and a stone's throw to Nags Head...if you wish to stay in the mid Outer Banks. (Kill Devil Hills) there is OBX Campground in Colington..private but decent...and Kitty Hawk RV Park which has smaller sites but full hookups...if you are coming during June to August, stay in Rodanthe and it's a short 20 miles or less into Nags Head from Rodanthe...any more info just PM me....also use exit 301 off of 40 to get to 440 don't use any other exit than than 301 from 40 going east to 440...or you will end up the wrong side of the 440 belt.