I'll start off with I'm a little baised on this, but I'd say Fire Fall Objective. I've also been to both events in the past. Fall Pump is fun, but doesn't hold a candle to this event.
It is by far one of the best scenario games in Missouri, on one of the best fields in Missouri. I took a group of nine to the event in May and it was by far the most fun I've had all year.
For the price ($45), you get entry to the event, Prize drawings, free player BBQ on friday night (It is really good!), pancakes on Sunday (not as good, but still a nice treat), air up to 4500 p.s.i, room to camp in a nice camping area, free firewood, and
BYOP after the purchase of 1 case of event paint.
Mark structures his game so there are multiple things going on at once and you can get involved rather easily. The bases and field are massive.
Also, Mark is one of the few surviving scenario producers in the state - and has been struggling with numbers as of late. The last game had a little over 100 (A small game for this field).
I invite you to at least try it once - you can even tag along with my team, The Pathfinders, if you like.