Are you allowed to bring your own airsoft ammo to use there? How about paintball ammo?

You have to use field paint only. Not sure about airsoft

Airsoft you can bring your own bbs

If you bring your own guns yes.

You have to use their ammo.

I think you can bring your own paint, not sure about airsoft. I know the paint has to be a special, biodegradable kind.

Im not sure about that. I would bring it along just in case you can.