If you haven't already discovered them, here are some website I found very helpful:
Danish census records: http://ddd.dda.dk/kplink_en.htm
Danish emigration archives: http://www.emiarch.dk/home.php3
General Danish research info: http://mydanishroots.com
I assume you know the peculiarities of Danish and other Scandinavian naming patterns, where the family surname changes from generation to generation until about the 1880s.
Best of luck to you,