This is a relatively easy and fun tower (with a couple harder-looking routes on it...) that is close to the parking lot.
Getting There
From campsite #3, walk toward the tower and right and down into a draw/dry streambed. You'll reach a point where two dry streambeds meet. Go up the left one (there will be a large bush at the mouth). Follow that for a ways and then cut left to the base of the tower.