T.K.
Is there a pumpkin patch in your area? Rather than go to the park, you could give the patch $20 to let you use thier pumpkins, hay, gourds and block off a little corner. OMG, i just had an idea. You could contract with the patch to set up for the day and take pics of the kids that come for like $10 a piece. You could just do it with a digital camera and email them the picture.