I think you are a visionary and a little ahead of your time on this one. I really don't think leadership overall is ready for such a bold approach, especially given that the church is highly authoritarian still and likes to control things rather tightly. This was hammered home to me once again just this summer when I watched this program ( http://www.channel4.com/programmes/meet ... sode-guide ) about a young missionary in Leeds. They spent a fair amount of the program showing some church official in the background to make sure nothing wrong was said.
The Church also has a history of treating those who question and make it public poorly – from blaming them, to threatening them with disfellowship, to excommunicating them. Bottom line – I don't think the Church is ready for such a gathering, even if I think it is a good idea. I also think those with doubts would fear attending because of the retaliation that might take place.
You mentioned that your leadership is seeing an increase of people coming in to bishops and the stake president with questions. I feel encouraged that is happening in your area because in most instances, the squeaky wheel gets the grease and maybe this issue will get some more attention in a way the Church can be comfortable with now.
I picture “help for those with doubts” as being a little more confidential. I think that if you built up a pool of faithful doubters like you and others that bishops and the stake president can refer people to in confidence, that might fly with the leaders and you might still be able to keep your TR

My two cents. Good luck and God bless.