It's good to take a look thru the flowers catelogue from the WC before arriving at the resort. That way, you have an idea of what they actually offer, and if the flowers you want are not in the catelogue, you can do the research and arrangements with outside vendors. However, seeing that you mentioned wanting a stress free wedding, I'm sure you can find something in the catelogue and make it work to avoid the hassle of finding an outside vendor.