Light travel? The last time my wife and I went to Ecuador, I had 10 pounds of luggage, all in one carry-on bag. Ana had just 8 pounds in her carry-on bag. We spent six weeks in Ecuador, at times on glacier-covered mountains, and at other times lounging on Pacific coast beaches.
Why travel lightweight? Simplicity. With only carry-on luggage, we were in a restaurant in Quito, while others still waited for their checked luggage. On busses our luggage was safely with us, not in the hold below being cut open, like one time when I was in Mexico. Others struggled down the street with three heavy bags, while we had our hands free and were walking comfortably with our daypacks. We had less to lose, less to be stolen, less to wait for, less to pack and unpack in hotels, and less to worry about.
Light Travel Issues
Expect an extra question or two from the customs officials at the airport (Six weeks with only this?). Also, a small bag may not work if you plan to bring back many souvenirs. In this case, you could plan to buy a second bag at some point, to carry your acquisitions. As for not having enough clothes and other things, it isn’t as big a problem as you...