I think people camp in different conditions than I do. When I do camp laundry, I definitely need something else to wear the next day. Clothes just don't dry much in humid conditions. So after a couple hours hanging outside, move them into the tent to raise the humidity there. And I'm talking about thin nylon/polyester pants or shirt or thin merino items that won the drip-dry comparisons at home before the trip. Last long trip I took it rained most days for the first 2 weeks. Not so much rain that it was unpleasant, but enough that the humidity remains high. Putting on still-moist clothing may be fine in August, but May in New England or at elevation in the Rockies would be miserable. I wear specific wool socks and they are worse for drying although they're more comfortable when wet than other clothes in all but the coldest conditions. So I can easily understand 3 pair of socks and 3 of underwear. For other clothes, I want something for warm riding and some layers for cold, knowing that I may have to wear something pretty odd if laundry doesn't work out for a day or 3 or 4. I remember riding through sleet in Montana in June, and I'll be ready for that kind of weather any time I go on a month-long trip that includes any northern areas. The next day was colder than the day with sleet but it was just rain. I don't plan to stop for 2 days of coffee.