Have a lovely walk with your dad. That is some journey. It is great that you took time out to sleep - clearly that is safer and your body needed it. At this time, accident can be numerous as everyone adjust to the snowy conditions. "Better safe than sorry" - so it as wise to slow down.
Sorry to hear about your uncle's heart attack and coma - must be so upsetting for you and the family. I hope he wiill make a speedy recovery.
Compliments to you for driving such a long distance. Have a great time with your family and all the best wishes for the season.