I have been up in a lot of those sites, I was up on an early warning site in Alaska in the middle of winter called Pedro Dome without four wheel drive but it didn’t work out well. I went off the road and had to walk 2 miles back to the site in 40 below zero weather. The northern lights were really cool and the wolves howling in the distance made the ordeal almost a Jack London type of experience.
The thing about 4x4 is when you need it you need it.