Hi Alley,

you've been waiting for than two years. By googling for two minutes I found an excellent guitar arrangement, fairly close to Schubert's original piano version. Here is the web page by some Tom Potter, with a link to this PDF file. The lyrics are original, the key of G major suits lower voices ("Soprano" is not required).

Now the "bad news": It ain't easy at all, not for me on the standard guitar, that is. You may try to transpose the song upwards, e.g. to A major.