Meadow, I feel for what you are going through. They made me beg and beg, they ignored my requests for reinstatement, and it took five or six meetings before they finally relented. Unfortunately, I moved to a new cong. right after being DF'd and it actually made things far more complicated. The new elders had to keep going back to the old ones and I had to meet with both sets. My final reinstatement meeting was with the original group. So I'm not sure whether that's a strategy that would benefit you.
One thing I did emphasize was my personal relationship with God. Right from the first meeting I kept telling them that I knew in my heart that god had forgiven me and was hearing my prayers. My relationship with god was fine, in other words, and nothing they said or did would change that. They, of course, cannot "see" that, so they judge on outward evidence of whether god is blessing you or not. Whatever that could possibly be.
Somehow you have to give visible proof of repentance, too. My problem was that they wanted certain specific things, some of which I was not prepared to do. They wanted me to quit my job - which I lost anyway because I worked with my brother and sister. They wanted me to not have married my wordly husband. They wanted me to not home school my kids so that they could associate with other JWs at school (now how twisted is that?). So they do look at every aspect of your life and they talk to other people to see what you have been saying and doing.
There was a WT study article on the prodigal son that came out while I was DFd. It really focused on how elders should be the ones reaching out - in other words, the father ran with open arms when he saw his son returning, he didn't sit there stony-faced demanding an accounting. I remember having difficulty sitting through that particular meeting, especially when one kind elder who had always been a friend to me put up his hand and emphasized forgiveness and how elders should be welcoming to DFd ones who were trying to return.
If you can find a copy it might have some ideas for you. It might be a good one to even bring along. I don't recall the exact date, somewhere around 1994-1995, I think.
Good luck on your quest. I know how hard it is.