Not sure where you plan to go in the outer banks. I've been to Avon a few times, it's on Hatteras Island and can only comment on cycling there. I'll never again take my bike, there is one road, Highway 12, you either go north or south, turnaround and ride back. Lots of traffic, especially trucks delivering things, and lots of side streets and shopping centers with cars pulling into traffic. Sand can also wreak havoc on your bike if it works its way into moving parts. I like going to the outer banks for relaxing, but the cycling in my experience is slightly worse than riding an indoor trainer.