We've traveled a lot by bike over the years. We've propelled ourselves in a non-straight line across the United States (4500 miles/7200km.) and wandered for months at a time in France, Portugal and Italy. As we have struggled up hills and mountains—because neither of us is a super athlete or a masochist—it has become deeply impressed into us how freeing it is to travel as lightly as possible. This style has crossed over to our other travel and without bicycling tools our luggage is very light indeed. On our recent trip to Italy, our luggage weighed 12 pounds (5.4 kilograms) each. Including the suitcase. And my purse. Yet we had everything we needed.
Traveling this light depends on drastic choices about clothes. It also depends on minimizing weight whenever possible. (How much toothpaste do you really need and can't you buy a new little tube along the way?) To take few clothes, one needs to wash clothes often and choose things that dry quickly. To dry clothes, clothespins and a clothesline are essential.