As temperatures flux in February, the state parks and historic sites in Georgia are offering an array of activities for the men and women who love the outdoors. Events range from an examination of the hemlock to a Valentine’s Day hike. Events are as follows: What: Valentine’s Day Tour and Overlook Hike at Buck Shoals When: 2-4 p.m. Friday Where: Smithgall Woods State Park, Helen How much: $5 parking What: GPS Basics with a handheld device When: 11 a.m. to 5 p.m. Saturday Where: Smithgall Woods State Park, Helen How much: $30 plus $5 parking.