My wife and I sang this in our daughter's wedding last summer. Not a dry eye in the house.

If you're choosing wedding music, you should have a look at this one. The sentiments and tone are wonderful.

Here it is again, for those not anxious to search for it.

Outward Bound
(Tom Paxton)
As recorded by Tom Paxton on "Outward Bound" (1966)

Outward bound, upon a ship that sails no ocean,
Outward bound, it has no crew but me and you.
All alone, when just a minute ago the shore was filled with people,
With people that we knew.

Outward bound, upon a journey with no ending,
Outward bound, uncharted waters beneath our bow.
Far behind, the green familiar shore is fading into time,
And time has left us now.

CHORUS
So farewell, adieu, so long, vaya con Dios,
May they find whatever they are looking for.
Remember when the wine was better than ever again,
We could not ask, we could not ask for more.

Outward bound, upon a ship with tattered sail,
Outward bound, along a crooked lonesome trail.
Things we learn, we'll just be satisfied in knowing,
And we'll tell it to our kids as a fairy tale.

CHORUS

(We could not ask, we could not ask for more.)