I have a couple aviation headsets (not active noise suppression) that I'm
thinking of taking to the NASCAR race in California in September. I can plug
my handheld scanner into the portable intercom, so that appears to make a
good package.

Although I've never been to one I've heard the track noise is deafening so
the question is: Are these headsets adequate, overkill, or just plain not
worth toting along?