Gumby, I believe that what Peter Egan actually suggested was to pack...and use...your oldest underwear, socks, and t-shirts, and after use, throw them out...and then buy new ones AFTER the ride, when you are back home.

Otherwise, you would spend a large amount of time while on the trip buying new clothes, and having to pack them into your bike.

This is an old IronButt Rally trick. Lighten the load as you go. Use up old clothing, leave it behind after you use it, and it lightens the packing load during an 11 day IBR event. Once back home, and your mind comes back to you (after the 11 day ride), then buy new clothes.