Probability, not guarantee
No destination can guarantee aurora sightings. A 4-5 night stay during peak-cycle years (2024-2026) with clear-sky windows gives you approximately 60-80% odds of at least one good viewing. 2-night trips drop to ~40%. Always plan for the non-aurora portion of the trip to be worthwhile.
The sunspot cycle
2024-2026 is the current solar-maximum period, which produces both more frequent and more intense auroras. 2027-2029 will trend toward solar minimum with weaker, rarer viewings. If aurora is your primary trip goal, now is materially better than later.
Technical kit
Smartphones since iPhone 11 and Pixel 6 shoot the aurora surprisingly well on night mode (3-10 sec exposure). Bring a phone tripod. A proper DSLR/mirrorless camera with a wide-angle lens (14-24mm, f/2.8) is better. No camera? Your eyes always win — put the camera down for the best minutes.
Dress for cold, honestly
Temperatures in January/February routinely hit −20°C in interior Finland/Sweden/Canada, and standing still outdoors for aurora-watching is bone-cold. Chemical hand-warmers, wool base layers, insulated boots rated to −25°C, and a heated glove option are all worth the cost.