Tried a State park near me... used the platypus and played around with setting. Got some clad and and a lot of junk but I managed my (I think) 20th silver of the year. A '51 Rosie. Picked it up at about 3" within the first 15 minutes 
<img src=http://render2.snapfish.com/render2/is=Yup6aQQ%7C%3Dup6RKKt%3AxxrKUp7BHD7KPfrj%3DQofrj7t%3DzrRfDUX%3AeQaQxg%3Dr%3F87KR6xqpxQQ0nxaJexelexv8uOc5xQQQ0GPJPJ0J0GqpfVtB%3F*KUp7BHSHqqy7XH6gXPGe%7CRup6eQe%7C/of=50,501,442>
<img src=http://render2.snapfish.com/render2/is=Yup6aQQ%7C%3Dup6RKKt%3AxxrKUp7BHD7KPfrj%3DQofrj7t%3DzrRfDUX%3AeQaQxg%3Dr%3F87KR6xqpxQQ0nxaJexelexv8uOc5xQQQ0GPJPJ0J0GqpfVtB%3F*KUp7BHSHqqy7XH6gXPGe%7CRup6eQe%7C/of=50,501,442>