I go down there every other year with the family. We stay in Duck so thats all I can offer. Its a nice flat ride up to Corolla Light and back but you want to go early in the AM. As the day picks up so does the traffic. Its about a 30mi round trip from Duck to Corolla. Can get windy but seeing that your from Bethesda you might have done the Seagull and it aint as bad as that. There's a trail most of the way but that gets pretty crowded during the day with the jogger, stroller, kids on bike crowd. Plus alot of cars pulling out from the streets dont really pay attention to the path. Slammed into a Jag once because of that. Hurt it more then me luckily.