I've only had Charlie for a year tomorrow, actually and he took to living indoors straightaway, after living most of his life in a noisy steel factory, then a feral compound with over 100 other cats, which scared him even more! He'd also escaped for 5 weeks last summer, i found him and then was rehomed from the rescue as he'd let a couple of the staff stroke him. He only lasted a week, escaped and was missing for 11 weeks and 2 days when i found him again and brought him home!!
I've known him since he was born almost, well, when his mom brought him out of hiding,lol and missed the chance to socialise him when he was young. Having said that, he'll sleep on my bed with Chuch and loves a fuss, he's never hissed once, looks at the tv if i switch it on when he comes into the room, hates aerosols and the vacuum (so does Chuch!) ,is terrified when the door buzzer goes, but ok with everything else! Your young ones should be fine in the house! I just kept Charlie in my spare bedroom for 5 weeks with a radio on and going in occasionally to give him some company . He used a used a litter tray from day one, which gobsmacked me-he'd never had one in the facory,lol!
Good luck!
