Venues
Hilton Head Wedding Venues
The places I would look at first after about 400 Lowcountry weddings and many years living on the island, with the numbers each venue publishes.
The Sea Pines Resort
Three ceremony sites and four reception rooms on the resort's page, from the Liberty Oak for 200 to the Magnolia Room for 80. It is the easiest place on the island to get the oaks, the marina and the beach in one day. My Sea Pines guide has the full list.
Honey Horn
The Coastal Discovery Museum at Honey Horn, 70 Honey Horn Drive, rents its grounds for weddings. The museum lists a 4,000 square foot covered pavilion, a terrace with a fountain over Jarvis Creek and ceremony sites under live oaks on 68 acres. It does not publish a capacity, so ask at 843-689-6767. Covered space plus old oaks is a strong combination for photographs.
Oceanfront Resorts
The Omni Hilton Head Oceanfront Resort says it holds ceremonies on its Shorehouse Oceanfront Deck or in its tree lined courtyard, with the Palmetto Ballroom inside. I have not seen an official capacity, so ask the resort directly.
I have filmed a wedding at The Westin Hilton Head, and you can watch that film here.
Across The Bridge
Montage Palmetto Bluff and Oldfield are in Bluffton and Okatie. Palmetto Bluff publishes eleven spaces from 100 to 500 guests.
Your Date
I lived on this island for years. Tell me where you are getting married and I will tell you how I would photograph it.