I know this might sound crazy but I just moved to a city where there are 100,000 people and hardly any public places to detect. The local park board doesn't allow any detecting in the 60+ parks here. There are no sidewalk/streets at all, and only a few older schools and churches. Have any of you printed business cards for "finding keys, lost rings, etc..." and gone door to door to try to get permission to detect? I'm sure I'd get mixed reactions being a complete stranger asking to dig in someones yard but I was wondering if anyone here has tried it and if so how did it turn out?