I am an artist and for my upcoming show in NYC I am working on photo series, silkscreens and sculptures that deal with mud. I would love to make pictures in a cave with small holes and mud, but I don't know where I could find such a cave. I'm looking for a cave where I can carry around a big camera and that is accessible for someone without caving experience, so basically a small one with 2 or 3 small holes and mud would be good enough. Howes Caves offers an adventure tour that seems perfect for the pictures I would like to take, but they told me it's impossible to take a big camera through the first hole you have to pass, besides they charge 108,- per person for the tour.
Does anybody know where I could find such a cave, preferable not further than 250 miles from NYC?