You can sometimes find tiny land snails in moist leaf litter and sticks. they are very small though and easy to miss. I live in Bergen county and have a few in my back yard in the brush piles. i usually find them when looking for worms for bait.
You can go to any forested area and look for moist litter.
They look like this:
https://c1.staticflickr.com/3/2472/3...756c6511_z.jpg
