I'm currently in Hilton Head
having just gone through the SC portion of the ICW
for the first time. There were some real little gems that I hadn't expected and was glad it wasn't rushed.
The entire AICW is a wonderful way to get a real honest to goodness experience of the US coast. It gets really tedious in a hurry though if you're just in it to cover miles!
Also, I find activecaptain to be a really great resource, but the open source nature of it sometimes means you see "Shoaling! Watch out for this shoal!" more often then is probably necessary
if in doubt, keep to the outside around bends for deeper water
All the best!