I also think it is rank childish that the MIAA event guys and this Madlax/Landon event guys could not split these events to two consecutive Sundays instead of one day.
I suspect that this particular weekend is really the only workable weekend for most high school athletes to shift focus to lax for one day. Most football, cross country and soccer seasons ended last Friday or Saturday. Winter sports started on Monday or Tuesday for most schools. The football players need a little time to recover and gear up for the next sports season. The kids I know have wrestling tournaments and hockey activities next weekend, so to have a second lax tournament next weekend would be a logistical challenge for many students. I think basketball teams often have practice the Friday after Thanksgiving and then possibly during that weekend as well. Anyway, unless most laxers play only lax at their schools, I wouldn't conclude that childishness of the events guys is the main reason for not splitting the events. Childish though they may be!