Based on my experience (raised in "da Troof," df'd father when I was 8, never dunked, occasionally shunned by ninja-JWs):
First, yes, kids are amazingly resilient. All props to my dad for staying with the family, putting up with my mother's JW crap, and offering an alternative. Something as simple as saying, "Reasonable people disagree about that" when a particularly whacko doctrine was under discussion opened up a lot of doors and confirmed my perception that there was something not quite right about the goings-on at the Kingdom Hall. It gave me "permission," if you will, to investigate rather than simply swallow undigested all they spewed from the podium.
On the other hand, since he didn't step in to keep us from constant exposure to the JW mindset, I internalized a whole lot of bunk. In my case, it was especially damaging--the JW attitude toward women is particularly disagreeable and guaranteed to cause self-esteem problems for a girl.
Furthermore, as a person who is spiritually inclined, the demanding, "heavy yoke" the JWs lay on you caused a lot of spiritual harm that's taken me a long time to unravel and heal.
But the best thing I could suggest is what my dad did--stay in your kids' lives, love & accept them, and offer them an alternative.
Warm thoughts to you and your kids.
Jankyn