Haven't seen a snake in a NY campground in a very long time, maybe 15 years...
Of course, I'm camping next week, so maybe I just jinxed that.
OTOH, I had a second job for awhile as the weekend manager/groomer/trainer at a local boarding kennel. Their summer kennel was built on a concrete/gravel pad, with plenty of nooks and crannies. It was home-sweet-snake nest for a colony of black snakes. Before ex'ing the dogs on warm mornings, I used to flip the hose spray across the gravel to 'remind' all the sunners to slither under the concrete pad before bedlam broke out. The one day I forgot to warn the snakes, the resident Bouvier cornered one as soon as I opened her run.

That was a fun way to start the day...