About cell phone coverage and towers. For emergency calls/contact.
Check with your US cell phone service provider, and ask about Canadian roaming, and who they partner with for coverage in Canada. If they pair up with Bell/Telus, you should have some sparse connectivity between Dawson Creek, BC and Tok, AK. If they are partnered with Rogers, you'll be pretty much offline for that same stretch of highway. Rogers has few if any towers in that area along the AlCan Highway.When we did the AlCan in 2016, we had to get a Virgin Mobile SIM card in Whitehorse, YT to get coverage along there.
Map of cell towers....
https://www.ertyu.org/steven_nikkel/cancellsites.html?lat=59.085739&lng=-106.172381&zoom=4&type=Roadmap&layers=a&pid=0&ds=0
