JMHO, if your only shooting 2-3 feet into the ground to decock, I wouldn't even bother with fletchings. If you shoot at that dark brown leaf over there from the treestand, well that's a different story. In my four arrow quiver I keep 2 new heads, a once or twice deer kill for the odd leaf, squirrel, coon, or coyote and a dirt arrow for uncocking at dark. If I'm at my cabin, I keep 3 good arrows and the once shot. I keep an old vaneless on the porch to uncock.
Don't shoot a vaneless at ANYTHING other than the ground in front of your feet!