You introduce yourself and tell them your intentions.Tell them the time and day you'll be there.Clean up afterwards.Come back later with a bow to give them from their own property.Chances are they'll remember you for sure.Be respectful,and appreciative.You are'nt begging here.Your showing a passion for something you like to do.
The only staves I trade for are wood that does'nt grow in my area.I've lived in the country all of my life.I'm a retired farmer.All of the other suggestions are good here previous too.Storm clean up,Tree service work etc.There is a lot of bow wood wasted all of the time.In this area osage posts are cut for fence lines all the time.Posts are for sale at elevator coop lots,sale barn lots,and all sorts of places.