Hi! You're not too far from Wilmington. We have friends that live in Doylestown.
Bikes of various sizes and helmets are available on CC. To my knowledge there is no multiple rider or tandem bikes available. There is a bike path which leaves the far end of the family beach at CC. It leads over to an airplane landing strip (complete with vintage plane) and down towards the adult beach (serenity beach) and cabanas. Once there, it turns from a paved road/path to a packed fine gravel/sandy path (unless it's been updated since last May) right near the cabanas and adjacent showers. It cuts along parallel to serenity beach and back towards a scenic lookout area. The scenic area featured a view of the ocean, not outstanding. I thought the view of the Magic from the family beach was much more enjoyable. At the scenic area there is a turn around and there was water (much needed) to drink. I hope this is helpful.
Howard