If you've been seeing more young folks in the Celery Farm recently, it's because there are several Pokemon GO "Poke Stops" there, as noted in this shot of the Pokemon GO app on my iPhone in he Celery Farm.  I encountered three Pokemon between the entrance and the Spillway.

If any Pokemon GO players come across this post and are thinking of visiting the Celery Farm, please be advised that there are poison ivy and ticks, so please stay on the trails -- and look up once in a while and enjoy the Celery Farm.

There's lots of awesome nature to behold.

Meanwhile, I have to post my sighting to ePokemon.org.  (Just kidding.) (Thanks, Annabel, for getting me started.)