I solved 90% of my problems anchoring by usng a anchor pulley system. Simply rig a line that goes from bow to stern on both sides w/ a couple of tie in points. Hook your anchor line to one of them and adjust the pulley to put the anchor in just the right spot to position the yak for fishing the spot you're working.
Usually works.
Of course I usually fish from my Hobie and the peddals and rudder help a whole lot too!!