M.L.
Even after the happiest, most carefree trip in the world, I need a little vacation to recover from my vacation!
I hope all of you will cut yourselves a little slack. Yes, dump on some extra TLC. Your boy may have questions in his mind and heart that he can't put into words. So might you, even though you're grown up.
Listen to him. (He may come up with comments or questions months from now, as well as in the next few weeks.) Talk with him. Get him to draw pictures of the trip if he's inclined that way. Let him know that everything is OK. Yes, it's too bad that Grandpa is sick. It's too bad that he yells, too, but some people are like that and we make up our minds to love them anyhow. No, Mama and Daddy aren't sick, and they sure don't plan to be, and they'll be here for him, and they won't be yelling at him unless he's in super-big trouble, and yes, Christmas is almost here.
I hope your son will find a great stuffed animal (or a truck - or whatever works for him!) under the Christmas tree to take to his own bed with him from now on.