Like most of you I'm always looking for a edge.The hi tec GPS equipment to me is more money and time spent,in other words another career.I found an Old Late 40s or early 50s Rand McNally Michigan Road Atlas.This grand old Atlas has Boat Launching Sites,Parks,Ski areas.The maps are in great detail.I cross referenced maps in this book with some of the current parks I've searched and they are older than I thought.There are three ski areas within a twenty mile radius that no longer exist,which two even had night skiing with seven or more runs.The Atlas has a lot of small town parks listed with a square symbol near the area.The Atlas also shows I75 not yet a road only under construction just dash marks.There's a lot of parks to search that were very active in the late 40s early 50s in this book.By the way, the Atlas cost me seven bucks on Ebay