I had intended to order another roll of Hamburg emigration lists (#470835) in an attempt to find the KRUG family, but I am crossing this film off of my list. After finding that Johann Christoph KRUG was already in America by January of 1853, there's no need for this film. This means that the family likely emigrated from Bremen, or even Le Havre. I fear this is another family that will require a list-by-list search.
There's always the possibility that the family's entry on a Hamburg emigration list (previously researched) slipped through the cracks, like that of Margaretha Catharina KRUG, but I don't know what the odds of that would be.