"I don't want a LW meetup having anything to do with Mormonism..."

Weak. It would be a good chance to discuss the proper use of priors, belief in belief, and curiosity stoppers - key LW themes. Those would help the group advance along more fruitful lines of communication.

Newsome FTW!

r_claypool provided some good links in that thread that addressed those issues. Additionally Lydia and Tim McGrew have penned a number of posts and papers dealing with the issues you raise.

I actually think that the topic could prove fruitful at a gathering in Salt Lake. Apply Bayesian principles and also discuss topics such as "belief in belief" and "fake explanations" prior to engaging the topic of Bayesian Mormon Apologetics.