Haven't played at other fields in the PA are at the time of this writing.
Skirmish USA has it's goods and it's bads. I went to Skirmish for the scenario event, Invasion of Normandy 2011. I myself am a scenario junkie with sniper tactics and speedballer gusto when required and have been playing scenario style games for over 10 years.
I will start with the field's pros. The shear size of the venue is outstanding. At 700 acres of property, Skirmish USA has enough variable terrain and bunker composure to satisfy even the hungriest of woodsball appetites. At the I.O.N. event we played the lower 345 acres. It was a grand piece of land to play on! The off field staff was very friendly and helpful. Food, though pricey, was good and well prepared. It wasn't gourmet, but it was prison food either. Drinks were comparable to most other fields in cost, $2 for Gatorade and $1 for a 20oz water.
Now, onto the cons. The on field referees were a mixed bunch of, what seemed to be, experienced players that were engaged and teenaged "whatever's" that didn't seem to care about the game at all. Regardless, the ref staff tried to let players run themselves for the most part. For an event that had 4000+ players, there simply weren't enough refs to make calls on marked players. I saw players wiping hits and otherwise cheating because there weren't enough refs to watch everyone. Additionally, there were a ton of people shooting hot. The refs were chronographing on the spot every time an eliminated player went to get healed by a medic ref. That would have been fine if players were owning up to being eliminated in the firs place. It was to the point that I called myself out and walked into enemy territory to watch what they did. Players that got marked would walk back out of the fray far enough to not be seen and wipe their own hits, then run right back into the battle. Dishonest players were in great supply at this field, but what got me frustrated was the lack of refs to keep them honest! This was a minor issue when looked at in the overall gravity of the event. Almost every shot I had taken was a bounce. The only shots that would break on me were either to the mask or at a range of less than 30ft. The reason for that was the garbage paint that was provided for this event. It was Draxxus paint custom made for the field as it had skirmish.com printed on the ball. At $80 a case, I expect some better quality paint. It was field grade paint in a custom box. Don't get me wrong though, I love Draxxus paint. But to charge $80 for a case of what was essentially field grade paint was a total rip off!!! $60 for Sat. & Sun. play + tax was a bit much in my opinion, especially after charging those prices for paint.
From what I could tell, this event was nothing more than a grand money machine for this field. Basing the idea that wholesale paint goes for $35 a box, if you charge $80 for it you just made $45 per box. Assume that a game this size will have each player buying 2-3 boxes on average. At 3 boxes per player, you just made $553,500 in paint sales alone based on 4100 players! Let's throw in event registration fees. 4100 X $60 = another $246,000. So all together, this field made about $799,500 in paint sales and admin fees. Almost $1,000,000 in profit, and I haven't even talked about the profits from food and other concessions!!! If you ask me, Skirmish USA has so much more to offer it's players in regards to fairness and getting your moneys worth. Now, I can't speak for recreational days of play. Perhaps that is an entirely different story and number crunch. But seeing as how I traveled all the way from VA to go to what was supposed to be the biggest and best paintball game on the east coast, I don't think that I will be wasting my time on the trip to chance getting ripped off again!