Where I live osage posts are the norm.When green of course the nails will go in,but still a stout staple is needed.Like you said earlier.10 year old ones though need to be predrilled if that's what a person wants.Fixing old fence here using ty wire is the quickest.Cool use of your poles if your blessed with osage around you like that.I might have left a few limbs on to hang things from though.
Drilling large holes through these corner and gate posts are always fun....lol.