Karin Jacobson is one of nearly a dozen docents at the Leelanau Conservancy that show the best of what Leelanau nature can offer.“We love Leelanau so much. I just want to be involved in the community,” Jacobson said.Jacobson among other docents will be hosting a guided hike Saturday at the Ingraham Preserve at Cedar River with the topic of ‘How has Earth Day impacted you?’As the docent liaison…