I agree with @
Kas_Can_Fly. Yeah, I know, you're shocked. ;)
You want a type of processing that doesn't have the *possibility* of sending you into a flashback. I hate to break it to you, but this type of processing doesn't exist. (Nor do I think it will ever exist.)
I went to a trauma center that had a newer type of processing that was designed to prevent the re-living aspect. (Every other attempt at processing threw me into horrible dissociation, and I didn't deal with dissociation as a recurring problematic symptom outside of talking about my trauma.) Yes, I still had emotional flashbacks during those two weeks, but there was no re-living aspect.
Trauma therapy isn't easy, but you want it to be. It's like having a thorn imbedded deep in your side and saying I want the thorn gone but not if it's going to hurt when you dig it out! Even with anesthesia, you'd still have some pain.
I think that after awhile the "I'm so happy and positive" facade will wear thin. You'll realize that simply being positive all the time isn't enough to get better. I don't think you'll ever become trauma free (as you say you will be one day) without processing your trauma, which means digging into the past and risking being mentally sent to a dark place. And yes, risking having more flashbacks.
I know you'll disregard my post and tell me that I'm being negative like you have in the past. But maybe, just maybe, you'll be able to realize that what I say has validity.