If you are in violation of a deed restriction,, you will get a note on your front door the first time. If you are see the guy putting the note on and are quick you can ask him about the violation, If you don't heed the note, you will get a registered letter and you can call and ask what them to explain the violation and then plead ignorance and have them come out and explain it to you.
North of 466, they are going to allow the CDDs to actual fine the homeowners for violations. Somewhere in the
www.districtgov.org website there is a page with the fines.
To answer your question, there are many neighbors that keep tabs on the visiting children and will call and complain if they recognize a child that has been here more than 30 days - even in multiple visits. I suspect that if the children are well mannered and do not make much noise, then you might get away with it. Just don't brag or advertise it.