Okay, since I live up here in the land of the summer midnight sun, here are some AK winter travel tips:
1. Limited daylight hours from about November to the end of January can make travel and PV power production a challenge. Feb and March are great winter travel months in the interior with generally clear weather and predictable road conditions. Mountain passes may have avalanche issues in Dec, Jan and Feb. Mid April sucks as everything is melting, roads have giant potholes and lots of mud
2. Most state and federal campgrounds (except National Parks) are closed from mid September to mid May to late May unless they are snow recreation sites. Most private tourist sites are also closed except winter recreation sites. those that are open often have only unheated pit toilets.
3. Moose don't like plowing through snow and love salt so they will be on the roads, ready for an unplanned 800#harvest.
4. Diesel can jell in severe cold conditions
5. Van water and waste systems will freeze up unless you are driving and maintaining a ProVan or something.
Good things about AK winter travel:
1 Ferry system rates are cheaper, usually not full but not as robust a sailing schedule.
2. no mosquitoes! No 'bagoes on the road!
3. Northern Lights!
4. Lots of winter motorized and non motorized recreation opportunities
5. Lots of flights to Hawaii from Anchorage!