Northlake Mall is also not very busy and has a great Santa. It's our preferred Santa now, and you can walk away with the pics and get electronic copies.
We like Northlake the best. North Dekalb was a little sparse in the Santa setup department, for my taste . I think Northlake looks nicer. There usually isn't a big line at either mall and both of the Santas are very sweet.
Re: last minute santa photos?