Living near Buffalo, NY we cross a lot. Generally if I am just dancing I promote the dance to the border person - they pass us through pretty quickly. IF I am calling, I do not mention it specifically, I say I am going to a dance at... Less information is more. However, as Chuck mentioned, if you are being paid huge sums that will be reported to CA, then I think you probably should say you are calling at ... As a tax preparer you should report all income received and there are special forms for monies earned on foreign soil.
Mary Collins
Buffalo NY area
"And those who were seen dancing were thought to be insane by those who couldn't hear the music." - Nietzsche
“Life is not about waiting for the storms to pass ... it's about learning to dance in the rain!” ~ unknown