Shit husbands don't make wonderful dad's.
They do not go hand in hand.
I love my DH to bits. So obviously hoping we never split! Hypothetically, I wouldn't have any issues handing over kids, even baby...because he's a superb husband AND father. I would miss them. But that would be it.
My narcissistic abusive ex was a cunt of a partner, and a shockingly shit father. I was petrified of him taking my DS.
I am tired of the 'get over it OP, his kids, his rules, his watch, he decides'. I made damn sure he saw DS on my watch. No to overnights. No to any contact without me.
Friend of mine had to hand over her daughter to a man that beat her black and blue, and there was nothing she could do, as he didn't show violence to the DD!
You wouldn't hand over your child to a nursery that fails children, or a childminder that is nasty, or family members that are toxic.
But the father? He's the parent too y'know...
OP. I get it. If the kids don't want to go, tell him that. Don't feel pressured. 5 is young with the wrong person. If my DH thought his children would be sad or worried with an overnight, he'd suggest a day meet up. But it wouldn't happen as my kids love him to bits.
I arranged all contact in public and with me. After 2 years of shit from him, manipulation and more, cancelling contact all the time, not paying, contact finally stopped. Bliss.
Good luck. It's hard x