We go to the laundromat if we are gone longer than a week. We wash about every 6-7 days. We bring enough for that amount of time and then wash. For longer trips, we just plan ahead where we will need to wash. Sometimes the campground has facilities, other times we have to do it in town. Like others said, it takes about 75 minutes total for wash and dry and fold, so not too much of a big deal. I usually bring along a roll or two of quarters on a longer trip so we have change for the machines. For 6 people camping, typically takes two loads of wash and one or two of drying depending upon the size of the dryer. We dry our towels and swimsuits out on a clothesline all the time at campsites with no issues.