The key of G would work. Do you know the song? It's a good one.

LYRICS:

The stars shine down on me only
The moon is pale
I search in vain
For love on the lonely trail.

I'm a blue ranger
But my heart's in danger
Would you bide awhile
Or ride a mile along with me.

On the lone prairie,
Things were so contrary
Love was in the air
But none would share it's song with me.

A moonlit trail
A starlit sky above
I cried a lonesome wail
In search of love...