I believe you have made a correct identification.  From the pictures, it does appear to be the Cicada killer. Here is some information I had collected on this wasp that might be of interest to you.

Cicada killers are large, and the female cicada killer wasps are not aggressive and rarely sting unless they are grasped roughly, stepped upon with bare feet, or caught in clothing, etc. One author who has been stung indicates that, for him, the stings are not much more than a "pinprick". 

Males aggressively defend their perching areas on nesting sites against rival males but they have no sting. Although they appear to attack anything that moves near their territories, male cicada killers are actually investigating anything that might be a female cicada killer ready to mate. Such close inspection appears to many people to be an attack, but male and female cicada killers do not land on people and attempt to sting. If handled roughly, females will sting, and males will jab with a sharp spine on the tip of their abdomen. Both sexes are well equipped to bite, as they have large jaws; however, they do not appear to grasp human skin and bite. They are generally non-aggressive towards humans and usually fly away when swatted at, instead of attacking. 

Female cicada killers dig extensive tunnels where their young will be raised, displacing several pounds of soil in the process.  Cicada killers may dig in the loose soil in vegetable gardens or flower beds. Drenching the area around their tunnel entrance with water is probably the best approach. The wasps do not like wet soil so they may abandon the site. Watering thoroughly will settle soil back.    Cicada killers may begin to dig in sandy areas on playgrounds or in golf course sand traps. If practical, keep these areas wet or regularly churn the sand to discourage wasps from establishing their tunnels. Control may be desirable in situations where physical damage is occurring or the presence of the insects is causing significant distress. 

The wasps have been controlled by sprays of the pyrerthroid insecticides (cyfluthrin or cyhalothrin).  Applications were made directly into the burrows or only to the entrances where the wasps contacted the insecticides as they entered and left.  Broadcast sprays over the area where cicada killers were nesting were not effective in reducing their numbers.

ALWAYS READ AND FOLLOW LABEL DIRECTIONS FOR SAFE USE OF ANY PESTICIDE! Hope this was helpful. 

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