Free Pumpkin Patch places?

I know there are several places like Dewberry Farms and Old MacDonald Farm that do pumpkin patches, but I have a 9 month old and we just want to get some cute pictures and buy a pumpkin not all the other stuff. Are there any good churches or places that have smaller pumpkin patches that do not charge admission? We live in the Humble/Kingwood area if that helps but willing to travel into the city as well. Thanks!