Kim, I have played with many great players,I have been nervous, mostly in awe. I am always ready to pick up some "trick" from them, especially in bowing technique.I have been fiddling for years so I comfortable with my violin. In my expereince I've found that "good" fiddlers and musicians will do all they can do to make the musical experience wonderful. They will feel your strengths and back you up, if you get a bit shakey, they will jump back on the melody until you find your way and then back off doing chords, harmony, counter melodies and complimentary playing. The team approach seems to work best with my music friends. But a word of caution, there's usally someone that follows the LOOK AT ME approach, instead of HERE I AM. In that case, I back out gracefully and let them do their thing. The music and the spirit is where it's at for me. I am content to play in the dark.