HHI? I hate you Mike......
Seriously, it is a place I so dearly love to visit. We stayed in the Plametto Dunes Plantation, and it was so gorgeous. Wonderful to sit on the ocean and just great golf. Make sure you play Hilton Head National, the Gary Player Signature track just before you come over the bridge to the island. It's a gem and so darn cost effective.
And of course go to Salty Dog and sit on the deck. An adult beverage or four is always in order there.
I am so envious of you my friend. Have fun and remember, give your fiance the credit card before you go to golf. That way she won't be so angry when you get back!