You could potentially get up to whatever punishment is authorized by then specific statute or ordinance you were cited under. Ignorance of the law is not a legal defence, so not "knowing better" will not necessarily shield you from the consequences, but the courts and prosecutors do often take exculpatory factors into account: so if it you did not know any better; it was reasonable to not know better (e.g. nothing was posted where you hunted); and you otherwise have a clean record, it is likely you will get off with no worse than a fine.