We love Harolds - like their t-shirts say "If you don't eat here we both starve". We have been there for breakfast and lunch - both are great but we prefer breakfast - very large portions! Looks like a dive - but they are GREAT! They have eggs, omlets, pancakes, etc. for breakfast and really good burgers (plus lots of other choices for lunch).
I must admit, as often as we've been to HHI, we've never heard of this. Where is it? We're looking for a new breakfast spot, now that Cracker Barrel is gone.
If you are coming out of the resort - turn left onto 278 (right #?). It is past Hilton Head Resort on the right - next to a gas station and I think there is a light there - it is just a little trailer-like building - have to look close!
PS They close about 2 or 3 - and are closed on Sunday.