Can you tell me where to find the statute outlining what is required to prove a parent is unfit?

It doesn't exists. Please retain counsel to properly prepare yourself. You are making a mistake otherwise.

How does the court determine “best interest of the child”?

For your case, you should really schedule a consult with an attorney to discuss.

What can I do other then document it down that my,ex took our 5 year old son to a jail to visit his 21 yr old who is in there ??

As counsel says, you can file a motion in court to prevent your son from going there.

You guys will need to figure out a schedule or you will end up fighting in court. You may want to speak to an attorney so you guys can have some...

Can my ex gf take our daughter out of state without my consent? There has been papers filed in a nys family court. Dave

Technically no. But nobody is going to make a big fuss if a child goes from Plattsburgh to Burlington on a Sunday afternoon. Please speak to your...

Probably not. Please obtain counsel, so you are fully informed on what you want to do.

How will a final order of protection affect my career?

It really depends on the career. Anything to do with kids, it will have impact. Please obtain counsel.

Can I get some type of custody of my nieces ?

It will be really difficult. Please speak to counsel.

Can I apologize my way out of if?

No. As counsel says, you cannot apologize your way out of legal trouble and make it go away.

Is my order of protection a full stay away or limited?

"Stay away" sounds like a full OOP.