At Camp Laughing Grass, campers have the freedom to use cannabis whenever they want. Maine is home to 140 camps, most are just for kids, others for the entire family. But there is a camp experience in Harrison that is a big draw for the 21-and-older crowd. At Camp Laughing Grass, smoking marijuana is not only allowed, but highly encouraged. For Laura Snowman and Eric Tardiff, camping along the Crooked River is paradise. The couple…