I think the cycling lords would give you a pass for a pad and/or undies this time. When I didn't or couldn't wear a tampon, I personally never had much luck sticking a pad to the chamois, so I would wear undies. It's not the most comfortable thing, but it's not the worst, either. Do you see my panty lines??? Tuff! Ask me if I care...I don't. 
I would recommend bringing extras and changing at rest stops as they'll get sweaty (yuck). There should be bathroom facilities available -- port-a-johns at least.
Good luck with the ride. Have fun.
Last edited by 7rider; 03-28-2008 at 09:55 AM.
2007 Seven ID8 - Bontrager InForm
2003 Klein Palomino - Terry Firefly (?)
2010 Seven Cafe Racer - Bontrager InForm
2008 Cervelo P2C - Adamo Prologue Saddle