The teen who asks Andrew for his signature at the ground-breaking is wearing a letter jacket from North Gwinnett High School in Gwinnett County, Georgia.
The glass featured as "Deep South Glass" is actually hand-blown glass, made by a company named Simon Pearce. Simon Pearce is based in Vermont, and was started by an actual Simon Pearce who emigrated to the US from Waterford, Ireland.
When Melanie's Father Earl returns home from the battlefield with Andrew he says, "Look what I found walking down I-58". If the movie is set in Pigeon Creek, Alabama then the only interstate anywhere close to that is I-65.