Great idea, Rob.
I see in the LCMS an attitude that it must give every appearance of being doctrinally pure. Let no one think that the LCMS is soft when it comes to interpreting doctrine. Unfortunately the anti-LGBT attitude stems from this. It is a matter of honor to be very anti-LGBT; it makes the LCMS appear holier. No greater insult can be thrown at a Missouri-Synod Lutheran than to call him/her a liberal.
I am still on the LCMS clergy roster (teachers are classified as clergy) until they remove me. I was asked to resign, but wouldn't do so willingly. I think the LCMS will be one of the last denominations to embrace gay Christians. But I also see in my case that the vast majority of the congregational members have no problem with me being gay. No one wants to upset the status quo, but I see hope on the horizon. Each little effort made to challenge the centuries of prejudice has an effect.
One good resource is the booklet by Mel White What the Bible Really says About Homosexuality
. It covers the topic very well and quite a substantial booklet. You can order it on this website cheaply.
Of course, I always recommend the DVD For the Bible Tells Me So
. I don't see how anyone could watch that and not be moved. Interestingly the pastor of the LCMS school where I worked objected to the statement in the DVD that we use clearer passages of Scripture to help us understand more difficult passages. I didn't understand the objection; that seemed common sense to me. To give out the DVD for free might be a bit pricey.
Are there any good materials written by LCMS pastors on the subject? I have not run across any.
And be sure to have free drinks. I went to the Great Commission Convocation in 1980. The best attended events were the parties in the evening. (Don't ever let anyone tell you Lutheran pastors are a sober bunch. Or just Lutherans in general for that matter.