Abs -
Don't know how I missed all of this so I'm chimming in way late. I really understand all of this and I'm sorry that you got triggered. It sucks. It's an opportunity to take a look and put more boundaries in place though. There are other people to get information from about life issues so at least not contacting his family is do-able.
Have a great time at the gorge and enjoy all of the music! This too shall pass - stay in the CBT arena and it will help you get there. All of those stirred up feelings are yucky I know........step one.....powerlessness and unmanageability....what needs to happen and what needs to change? Good stuff in that step.
You're doing it girl.....progress not perfection. No contact is hard but in the long run it is what quells the pain.
Have fun with the music!!!!!