I have played at almost all the fields within a forty five minute drive of Doolittle, and I prefer playing at Missouri Outfitters, especially for speedball.
Directions to the Field:
Its really easy to find. Just take the Doolittle exit and follow the North Outer Road West one mile. It is on the right hand side of the road.
Missouri Outfitters is one of the only fields in the area with an air ball field for speedball players. If you prefer woodsball, they have a 30 acre field that they use for scenario games, but it's only available by reservation because its off site.
Paint used to be more expensive, but they recently lowered prices to $45 a case for a box of Karnage. Entry fee is also really cheap: $8 includes all day air.
They have a large building for a staging area and a small proshop inside it, but they have mostly gear, not many guns for sale.
The hours are a little funny, they are only open for play on Thursdays and Friday afternoons and all day Saturday, but the owner will come out anytime if you call like a week early and reserve the field.