Good luck, if you have an iPhone / smartphone bring it, I really liked being able to communicate with friends and family via facebook or text messages and if you have iOS6 you can put your phone on do not disturb and it won't beep or vibrate or anything that will annoy you or others in the hospital. Not sure what the rules are at HEI around phones but in my Hospital all the official literature said no phones in the ICU but when I got there all the nurses had them and told me it was fine.
I was prepared to be SSD but I wasn't prepared for how much my balance would be affected - everyone's results are different but be ready for some wobbly head and such - they got me out of bed the day after the surgery and it was difficult, four weeks out now and I'm heading back to work tomorrow, I followed the doctors advice and got out walking as much as I could during my recovery, using hiking poles for the first week. In my case the more I exercised my balance the better it got. I'm also doing vestibular rehab with physiotherapists that specialize in neurological issues.
As for your kids, you may find that they will find it 'empowering' for them to take care of superdad for a bit. My son, who's 17, really got a boost out of having to be the man of the house for a few weeks. It was amazing to see the transformation from me always having to tell him when to take out the trash or clean up to doing all that without being asked and volunteering to help out to make things easier for myself and my wife. There are good things that can come of bad situations!
Again good luck, it's stressful and scary, hope you have a great outcome.
Peter