Hi, I'd like to help you with your question.
There are many therapy options available that you can choose from. You may not necessarily need a 5 day intensive group treatment. PTSD can be treated on an outpatient, once a week therapy session option as well. It depends on what you feel you need.
If you only had an evaluation by one facility/ therapist so far, you can seek out a second opinion (or more if you feel you need to). One place to start is your local community mental health facility. They offer outpatient, groups and other treatment options. They usually accept most insurances and cost less that most therapists or facilities. To find your local community mental health center, contact your city government offices, look online or call the United Way for the information. The United Way is another resource that can offer you resources in your community. Contact them to get a list of your options.
You can also contact your insurance company for lists of available therapists you can see. Once you know who accepts your insurance, it will be easier to get another evaluation to determine what you need for treatment.
Unless you are in immediate distress and are having problems functioning, outpatient therapy should be enough.
Also, you can help yourself at home. Combined with outpatient therapy, PTSD can be effectively treated. Here are some resources to help you:
The PTSD Workbook: Simple, Effective Techniques for Overcoming Traumatic Stress Symptoms by Mary Beth Williams and Soili Poijula
The Post-Traumatic Stress Disorder Sourcebook: A Guide to Healing, Recovery, and Growth by Glenn R. Schiraldi
You can find the books on Amazon.com or your local library may have them for you.
As long as you feel you can use a combination of therapies and support, you can treat your PTSD very effectively.
I hope this has helped,