December travel advice : Tromsø to Lofoten

We are planning fly from the states to Tromoso and rent a car, stay 3 nights, to explore the city, visit the Ice Domes, and chase the northern lights. On day 4, drive toward Lofoten, with one overnight stop along the way. stay 3 nights lofoten and return the rental car at Leknes Airport and fly to Oslo.

My question:

1. Which rental car companies are best suited for driving in northern Norway in December?

2.What is driving like in this region in December?

3.If we choose to fly, will we miss out on significant scenic experiences along the drive?

Any recommendations would be greatly appreciated!