I didn't get married at the Hilton so I'm not sure how the WC's there were. I think it depends on you and your comfort level. If you're super hands on, detail oriented and prefer to be in control, then I say you can do it all yourself. The vendors, at least the ones that I worked with, were super reliable and easy to communicate with. We didn't hire an outside WC and just used the resort coordinator and it worked out really well.