From the general area description:
Drive to the end of the Rose Canyon road and park in one of the large lots, there is also some parking along the road if it is crowded. I think as long as you park by a blue dumpster, you are ok. From the slabs behind the (defunct) snack bar and picnic ramada, pick up a trail(about the top and middle of the slabs, maybe a little on the left side) heading north/east(the trail will go mostly east and curve south slightly) and take it to the ridgeline(crossing several fallen trees), then follow it to a clearing/slab. For the Towers, Wall of Marching Munchkins, and Wall of Dancing Dwarves, turn right and follow a short section of well-groomed switchbacks downhill to the climbs. The Towers is the first section of routes you come to at the bottom of the switchbacks.