I know a convention planner who frequently organizes conferences in Wichita for a group of 125-150.
If Wichita winds up being the location, I'd be happy to communicate with her to see what she thinks about organizing something, with regard to hotels, etc.
I like Jonathan's ideas about Hot Springs, but not too much to do there except ride.
Maybe we should also consider Dallas, and see if we could talk Stroker's into considering a party theme like "Dog Day Afternoon", or "Dog Days". I don't know how they schedule that sort of thing, but if it puts a significant number of extra party folks in the building, I'd think they would like it. I'm pretty sure a number of us have gotten to know Rick and Amy across the years and would be OK to contact them to see if they would entertain such an event. The lead time really helps to plan this. And Johnathan is right about the year flying by....
Just my 2cents.