I no longer mention what I carry. If they ask, I tell. I don't carry CDs as backup, but a fully stocked 2nd PC. I might even go as far as carry spare HD's. Many clients liked me because I was the 'digital dj'. Please read me FAQ
www.djed.com/mp3.htm as it addresses a client's concerns. If you want to use parts of it, please ask and give credit. Thanks!
Ed