This is what I do. Just bring 2-3 sets of clothes and do a quick rinse and wash with dish soap in the sink every 3-4 days and dry on the lifeline and you should be good to go. I'd rather do that because I can do it in a jiff while waiting on others to get themselves together. The last thing I want to do on vacation is sit by a machine and wait.

That said, doing the family thing with my parents and inlaws next trip and I am thinking of making sure that laundry facilities are available to them near mid-trip. But I'll be out snorkeling while anyone who chooses to do so does laundry!