With a tree saver hammock strap you can use a hammock without damaging the tree and his bark.
I seems so east to use a hammock, but it can cause a lot of damage if you use the wrong way to attach them.
I have found several options to do it with causing no damage and in that way be safer to nature.
I found these online and read on how people use them. It actually is easier than you maybe think. They are easy to attach and many of them can hold more pounds than you can imagine.