Yeah, you don't usually see a lot of women wearing aloha, unless it's more touristy locations or at a luau, or at an event where you're wearing something like Midoria mentions. I have some dresses that I wear to events that call for aloha attire, but they're less "hawaiian print" and actually things I could get away with on the mainland in the summer. They aren't tourist dresses. I have tourist dresses , but they're not the same. Really hard to explain. Don't try to wear a mu'umu'u. LOL Men tend to wear aloha shirts lots of places: out to eat, church, work. My son gets to wear them on Fridays for school. once you've been here for a while it's easy to pick out the tourists because tourist shirts are generally way bright, way cheap looking. Good mens aloha shirts are expensive and they are taken as dress up clothing.
All that said, you're tourists, don't even bother trying to blend in. Just wear what you want. Wear aloha when you go out to eat, have fun, but don't spend a ton of money on clothing you're never going to touch when you get back to the mainland.