This is a field puzzle cache. The container is at the posted coords but you have to figure out how to get to the log to sign it. You DO have to SIGN the log to be able to claim this find. Everything you need to solve the puzzle is near the container. Please REPLACE everything as you found it so the cache will be ready for the next person to find. 
Please help us keep this beautiful park clean by bringing a bag with you and pick up some trash! The residents of Logan Martin really appreciate this!!!