I will be traveling in August from Aarhus to Hjorring by train pass, then Hjorring to Hirtshals by private rail to get a ferry -- not sure yet whether "Color Line" or "Fjordline" --to Kristiansand, Norway, to (hopefully) continue on to Oslo.
Using Rick Steves' Scandinavia book for advice, the Deutsche Bahn train schedule website, the "rejseplanen" website for private rail portion, and both ferry lines' websites, it looks like the only train from Aarhus to connect with the Hjorring to Hirtshals Havn and catch a morning ferry would leave Aarhus at 06:21 am. There doesn't seem to be another train leaving Aarhus until 09:51 am, which would miss any morning ferries...this later ( 9:51 ) train with connections gets to Hirtshals Havn at approx. 12:32, and Color Line leaves at 12:15 ( Fjordline earlier at 10:00 ).
I guess my question is if I'm missing something in these schedules, and also if the private line schedule on the "rejseplanen" website would be similar in August, since it only allowed me to pick a travel date through mid-April. Finally, is it highly recommended to book the ferry from Denmark to Norway in advance, thus "locking in" seats, but also risking a loss of ticket costs if for some reason there is a problem making the connections ? Thanks for any suggestions, or experiences of other travelers who went the same route...it's not the end of the world to get the 06:21 train from Aarhus, just wondering if any other options.