Official Paintball Games is a great field to play. The check-in is well-organized and all of the staff is very friendly and quick to get you out to the fields. The price for walk-ons is $25.50 including all-day air, which is pretty reasonable and you can bring your own paint. They have 8 or 9 covered pavillions with picnic tables where players can leave their stuff and rest between games.
The refs are all teenagers but friendly and very helpful. The last time I went out, my CO2 tank busted a leak and the ref arranged for a loaner tank. They are good about enforcing the safety rules without being pushy. They also pay close attention to the game, responding to "paint check" calls quickly on most occasions.
They have several woodsball fields that I enjoy playing. (There are also 2 "cyberball" fields, but that's not my bag, so I didn't play those.) Their plain woods field is big enough that a 12-on-12 game isn't overcrowded and they have some good sheds and bunkers set up. The "Westworld" field is set up with 3 rows of shacks that imitate an old west town which is a lot of fun to fight building to building. The "Bridges" field is pretty cool but lacks cover which leads to a long stand-off. The "Black Hawk Down" field has a scrapped helicopter, trucks, and cars in the middle and you try to battle from one tower to your opponents' tower. They also have two different forts which you play either as attacker or defender - well built forts with good bunkers outside for the attackers.
This is a top-notch field with good staff and prices.