Count me in as a yearly Hilton Head visitor! We have a timeshare at Waterside right next to Coligny Plaza...Look up Spinnaker Resorts and you will find them..they always do great deals for vacationers! Fully stocked kitchen so you can shop for food and do some great cooking...
My must go to and eat place?: The Frosty Frog Cafe in Coligny Plaza! Frosty Frog all the way! It is tucked in a corner, but oh my the food and the frozen drinks!!!! Think 7-11 Slushie machines with alcohol! I have yet to try all the drinks in a weeks time but maybe in Feb.. If nothing else get a Pond Water! It is all the drinks mixed into one and is a good nights sleep if nothing else...
Also, make sure to peruse the shop of Black Market Minerals also in Coligny...this is where I buy a years supply of incense...and my daughter loves the jewelry--prices aren't bad either.
Certainly take the drive to Savannah, but also make the trip out to Tybee Island (outside of Savannah) and climb the Lighthouse--the view is gorgeous!
Take the time to just walk the beach...but be warned, if you start at about 5 pm or after and love to walk, the dark may catch you! (Been there done that) and believe me---the beach is very dark at night due to the restriction of lights (protecting the nesting sea turtles) Make sure to know the marker number that you came onto the beach at..
When you are looking for Wal-Mart or any type of shopping or restaurants---all of the signs are low to the ground and tucked into the trees--so you may find yourself doing u-turns--and be careful of the traffic circle on the south end--just make sure to always use your turn signal when leaving the circle....
Hilton Head Diner is a great place for a really good burger.
Plenty of Mini Golf on the island also! My favorite is Pirate's Cove!
Enjoy your trip! Enjoy the laid back atmosphere of the island..you will become addicted!