I was always one of those people that refused to do laundry on vacation and thought people were nuts who did.

Then, last August trip, we were there for 9 days in the oppressive heat and neither me nor my husband really have enough hot weather clothes (since we don't usually need them) to get us through the long of a trip in that weather. So, I scheduled in laundry time.
And it was WONDERFUL!

Left the husband in charge of child entertainment, and went and sat at the quiet pool for an hour alone, reading a book uninterrupted, and enjoying the silence and no one hanging on my body or asking me for something.
Now, I plan laundry for most trips and packing is so, so, so much less stressful. I just throw everything I feel like packing and carrying in the suitcase and know that I can do laundry when we get there. We stayed at a villa on our last trip and we only packed a couple outfits each and did several loads of laundry and came home with NO dirty clothes. It was great.