Going back to about 2000, here are some interesting fiddle threads that might be a help in thinking about backup playing.

~S~

Fiddle tune backup: how to find chords?

Difference Between Fiddle and Violin

learning the fiddle

The fiddle and the blues?

Help: What's it called when the fiddle goes...

Fiddle vibrato techniques

Playing harmonics on the fiddle?

Help: fiddle tune rhythms

recommend good fiddle duet books?