Of course! Visiting Bremerhaven, Husum, Kiel in Germany is a fantastic journey. Here are some useful tips for your travel:

Best Time to Visit:
The best time to visit Germany is during the late spring (May) and early autumn (September) to experience mild weather. However, you should note that this period also corresponds to the peak tourist season.

Route and Accessibility:
You may fly to the nearest airport in Hamburg, then take a train or bus to reach Bremerhaven, Husum, and Kiel.
Bremerhaven and Husum are about 2 hours away by train from Hamburg. From Husum, it is about an hour drive to Kiel. Alternatively, you can rent a car for more flexibility.

Altitude and Acclimatization:
These cities are located at sea level so acclimatization to altitude is not necessary.

Accommodation and Booking:
Reserve your accommodations ahead of time, especially during peak tourist season. A wide array of hotels, hostels, and guesthouses are available in these cities.

Clothing and Essentials:
Pack lightweight clothing for the day and a light jacket for the slightly cooler nights. Always bring a good pair of walking shoes, an umbrella (in case of rain), and don’t forget your camera!

Health and Safety:
European Health Insurance Cardholders can access necessary state-provided healthcare during a temporary stay. Personal travel insurance is still necessary. Tap water is safe to drink in these areas.

Local Etiquette and Respect:
Germans respect punctuality, privacy and they separate their professional and personal lives. The people of Northern Germany are known for their straightforward and reserved demeanor. Always remember to say "please" (bitte) and "thank you" (danke).

Lastly, remember that Germany has strict laws concerning the preservation of historical sites, refrain from littering, refrain from making loud noises and respect public order. Enjoy your adventure in Germany!