That's not a bad way to look in the mirror, its an angle I have not thought of as I have a son ... but I did want to appear to be a role model in my sons eyes, I did worry about how I was perceived with my W having an A, and the appearance that I might look weak by standing for the marriage vs looking strong.
As far as the airport I completely get why you would go, trying to put myself in that spot I do not see myself meeting W and S, I would simply wait till I could go get S and spend the time with him then as the airport meeting would be awkward at best, your W will be tired from the trip and I just see this as poking the bear when its not needed.
Again .. your choice. Just PMA and remember why you are there ... the girls ....and thats it.