just try not to carry very much .. see the ultra light touring threads .. there is a self supported race across america
Almost done in less than 3 weeks .. No one there carried Much at all ..
http://trackleaders.com/transam15 leader at 3964 miles as of today.
NB lots of people Buy a BoB trailer and tow it behind their Road Bike.
so racks and panniers are not compulsory to go on a tour on your bike.