Heather,

I know I don't post to you normally but I lurk from time to time. I worry about you frankly, but this struck me...

Now, how can I say no? He hasn't seen the kids in days and S5 wants on Daddy's shoulders for crying out loud.

Let him carry the bag AND the kid. You did. Statisically speaking, the male is usually larger and stronger. If somebody should take on the extra physical burden then it ought to be him. Hell, I have carried both kids (same age as yours) AND the bag many times. I'm sorry in advance, but what a jerk.