The only tree in my yard is a huge oak tree that is not a climber. I can climb on my flat roof to practice shooting at a downward angle, but I don't have a way to practice shooting from a saddle. I got to thinking about old telephone poles and putting one of those in the yard to climb for practice and I think that will work. Anyone ever do something like that? I'm wondering how deep I need to sink it to be solid and area of concrete to use.