Sleeping Tree Camp is a giant camp located almost due west of the Western Watchtower, east of Broken Fang Cave and north of Bloated Man's Grotto. It is possible for the Dragonborn to receive a bounty for killing one of the giants there.
Like all giant camps, it contains a chest and several Mammoth Cheese Bowls. Unlike the other camps, there is a large purplish tree at the center of the camp, the "Sleeping Tree". That tree has a spigot which can be used to obtain the magical Sleeping Tree Sap.