Sure, here are some travel tips for these beautiful remote destinations.

Best Time to Visit:
The best time to visit Norilsk, Dudinka, Dikson is during the summer (June through August). The weather is less severe, and the midnight sun can be seen in Norilsk during June.

Route and Accessibility:
Traveling to these locations can be challenging due to their remoteness. Norilsk is not connected by road and can be reached only by airplane or boat. Dudinka is accessible via the Yenisei River and by air. Dikson is best reached by air or sea.

Altitude and Acclimatization:
The altitude of Norilsk, Dudinka, and Dikson isn't extreme, so altitude sickness should not be a concern. However, the severe cold during the majority of the year can be physically taxing, so ensure you are physically fit before embarking on the trip.

Accommodation and Booking:
Accommodations in these locations are limited compared to other regions. It's advisable to book your accommodations well in advance.

Clothing and Essentials:
Carry warm clothing as the weather can get extremely cold, particularly outside of the summer months. Essentials like sunscreen, sunglasses, and lip balm should be carried to protect yourself from the sun and the cold dry air.

Health and Safety:
Ensure all necessary vaccinations are up-to-date. Carry basic medicines and packs of warmers. Be prepared for the cold weather and long periods of daylight or darkness, depending on the season.

Local Etiquette and Respect:
Be respectful to local customs and traditions. Norilsk is a private city and gaining permission to enter can be difficult. Remember to follow all rules and regulations while in the area.