I have some api climbing sticks that are awesome. They come in three pieces, each piece is about three feet long, so depending on you gait you could get around fifteen high. They' re rock solid. They may slip a little at the first as they get settled to the tree, but after ward they' re solid. I could bounce up and down on mine and they don' t budge, and I weigh over 200lbs. They use a strap on buckle type system where you push down the end to slip the strap through, then when you let it go it' s held down. Pull it hard as you can and it won' t go anywhere.

Brandan