Dear Mr Ray Bayles, I have got your problem with wedding music from my
daugter, who is a cellist and got it from classical list memeber.  She
entitled me to provide you with assistance of some extend.  Here you have
short list of most popular classical composition frequently performed in
occasion like the yours one:

R.Wagner: Wedding-March
J.S.Bach: Air
C.Gounod: Ave Maria
G.Tartini: Cantabile
R.Schumann: Traumerei
F.Schubert: Ave Maria
G.Handel: Largo
T.Albinoni: Adagio
F.Mendelssohn: Wedding-March

Entire list I've got from site:
http://www.virtualsheetmusic.com/downloads/Miscellaneous/WeddingCello.html
which provides wedding collection for: cello and piano, trumpet and piano
and finally for violin and piano. Moreover they give you chance to dowload
sheet music for desired composition for quite affordable price and listen
to selected one (Real Player or MIDI files).  Try it!  God bless your
daugter and you with the wedding.  And also grandchildren for you (in
reasonable number).  I'm sorry for sending you this message not for the
list but to your private mail box.  Feel free to distribute this one within
the list if you feel like that.

Mieczyslaw (Mik) Szwajger
Poland