Washing your hair too often strips the oils out of your hair, which then leads to breakage and it is easier for the sun to damage your hair when you’re out and about.
I recommend you get a haircut before vacation. This way you’ll have a fresh do with no frizz or split ends to become damaged by the sun during your trip.
Some dryers that hotels provide will damage your hair and never work right, meaning you’ll spend a lot of time trying to get your hair dry before you can go out.
When you’re on vacation, you don’t want your hair flying in the wind all the time. Instead, bring hair accessories to braid or tie your hair back with.