Found an 1960's American Camping Association Pocket Songbook Using the Roundup Lullaby Name which gives the lyric credit to Badger Clark and the tune to CliftonW. Barnes. Lyrics are a tad different...

ROUNDUP LULLABY badger Clark/Clifton W. Barnes

Desert blue and silver in the still moonshine,
Coyote yappin' lazy on the hill,
Sleepy winks of lightnin' down the far skyline
Time for millin' cattle to be still.

CHORUS

So, now , the lightin's far away,
The coyote's nothin' skeery,
He's singin' to his dearie;
Hee-ya, tam-ma-lal-le-day!
Settle down, you cattle, til the mornin'.

Nothin' out the hazy range that you folks need,
Nothin' we kin see to take your eye,
Yet we got to watch you or you'll all stampede,
Plungin' down some 'royo bank to die.

CHORUS

From SUN AND SADDLE LEATHER @ 1935,1936, Chapman & Grimes, Inc. Music @ 1947 by Ralph H. Lyman

My own camp lyrics are different still...

Tinker