I want to make a hammock stand as I only have one tree in my garden
and I imagined it would look a bit like the one in the link (the picture is too big to paste)
http://www.instructables.com/id/wooden-hammock/
My questions are, would 4x2's be strong enough to hold 150lb person and what can I do to make the uprights less slippy as I rather use it to not only dry my kit but also test my knot skills, rather than use hooks?

http://www.instructables.com/id/wooden-hammock/
My questions are, would 4x2's be strong enough to hold 150lb person and what can I do to make the uprights less slippy as I rather use it to not only dry my kit but also test my knot skills, rather than use hooks?