I can't help with your specific area, but inquire at parks and townships - the rental fee to use a pretty area like this might be cheap - or free to residents.
The easiest way to cut costs it to go small. We had 85 guests, no booze, and our party favors were totally cheap. You know those striped stick candy? We found some in our wedding colors and tied them in bundles. They were $.30 per guest. Of course, those are extras that aren't necessary!
If you want a wedding party, ask them to wear what they'd like as long as its semi-formal. Skip flowers, you can hold a single stem if you'd like.
Creativity is key - a wedding can be done with very little money
