I think its good to have if you log down the moon phase, temp, wind and a topo map where you sat that day. I'm starting one next year for public land and our land. Im printing off topo maps for all property's and then making 100's of copies. Each page is going to have a topo map, where I sat that day, wind direction, moon phase and dates, and what type of deer I seen. Something fun and one day I'll pass it on.