Fins are something we always bring - not just because I have dive fins, but because you want fins that are comfortable. Dive fins are great because you can wear a water shoe which prevents chaffing.. If you go with regular fins, you want to make sure they fit well to avoid chaffing too. That's the real key.

And fins are a huge plus as mentioned above.. Very little effort to move and you can propel yourself much faster as needed. Just be aware of them and watch out you don't kick coral if you are shallow..etc.