Your wedding planner will know the most exquisite places in town to host your wedding at, as well as the best wedding caterer in the area. Not only that, but many planners have personal relationships with venues, bakers and caterers, which they can leverage into a discount. Planners often pay for themselves, saving you money on anything from tux rentals to beautiful, tiered wedding cakes.
Have you considered that something could fall through and possibly go wrong? The most experienced planners will have done enough weddings to have contingency plans in place for any disaster. Not only will the work with your venue too ensure you are taken care of in the event of a fire or flood, they will make sure that the caterer is on time and that everything is perfect for your special day.