Book your photographer and videographer as soon as you can. I am regularly booked 2-2.5 years ahead for the busier summer months (June - September).
Having a photographer with lots of experience !!! Any decent photographer can take nice images when the weather is nice outside. What sorts the average photographers from the better photographers, is that the better photographers will be just as creative with images taking inside venues, when the weather is too bad outside for photography. To date I have photographed over 1200 weddings, so I have a vast experience at shooting weddings in bad weather.