A 32-year-old male veteran presents with nightmares, hypervigilance, avoidance of crowds, and emotional numbing following combat deployment 2 years ago. He also reports drinking 8-10 beers nightly to "quiet my brain" and meets DSM-5 criteria for both PTSD and moderate alcohol use disorder. He completed medical detoxification 2 weeks ago and is motivated for treatment. What is the most appropriate treatment planning approach?