A small group of older men camped near us last night. They brought a lot more gear with them than we did, including folding chairs. From the looks of all the stuff they had, it seemed unlikely they were hiking many miles per day.
We didn't socialize with them much because they were a little too far away for that. We didn't ask about their trip, but I think they might have hired a boat to drop them off nearby. Seeing all of their gear made me think they didn't walk the whole way, as we did.
We couldn't see Fontana Lake from our campsite, but it was only a quarter-mile away. Several of the campsites on the southern end of Great Smoky Mountains National Park, including Pilkey Creek, are accessible from the lake. It's possible to travel from campsite to campsite by boat or start a hike after being dropped off by a chartered boat.