We just went a few weeks ago and people were wearing whatever they wanted. Alot of people wear Hawaiian prints because they take a picture of your party before you are seated. We loved it. Have Fun!
We packed our Hawiaan shirts just for the occassion. It helped us get into the mood a little more and enjoy ourselves. (That, and the Mai Tai we started with.) But you'll fit right in wearing park attire. It's not a formal affair by any means.
I've been waiting for the perfect occasion to break out my grass skirt and coconut bra! Thanks for all your replies. It was a last minute addition. I called yesterday and was able to get in next Wed!! Thanks again!