"Apache" Wedding Prayer?

In doing a little background reading on the Navajo Wedding Vase, I decided to research a popular blessing chosen by a number of couples with whom I have worked. It is most commonly called “The Apache Wedding Prayer," but I was wondering if it was really Apache in origin, because it has also been known as an “Indian Wedding Blessing.” According to author Rebecca Mead, the earliest version of this prayer was written in Western novel Blood Brother, by Elliott Arnold. In 1950 it made its way into a film adaptation of the novel called Broken Arrow, written for the screen by Albert Maltz and starring Jimmy Stewart. Alas, the popular prayer is not from Apache tradition, but has its origins in fiction and in Hollywood.

Nevertheless, feel free to use it if it speaks to you! Here is the version most couples I know have used:

Now you will feel no rain,
for each of you will be shelter for the other.
Now you will feel no cold,
for each will be warmth for the other.
Now you will feel no loneliness,
for each of you will be companion to the other.
Now you are two persons,
but there are three lives before you:
his life, her life, and your life together.
May beauty surround you both
on the journey ahead and through all the years.
May happiness be your companion
to the place where the river meets the sun.
Go now to your dwelling
to enter into the days of your life together.
And may your days be good and long upon the earth.