Kevin, it sounds like you are doing great. You didn't gush and go overboard when W was around. Not much more you can do then that. Pleasant and civil.
Six Flags should be fun. Make it all about the girls and not worry about what W says or does...I know easier said than done.
Me: 46 FWS: 36 Married and Divorced 4/07, Pregnant 7/07,False R 7/07 Baby Girl born 3/08 Kicked him out because OW: 7/08 5/10 He realized what he had and lost. Moved home! REMARRIED 3/14/11!!