The large towns are not much different in Canada and Alaska, than in the lower 48. Smaller communities will have more limited grocery stores with higher prices. Very few of the government campgrounds will have site hookups. Most private campgrounds are more of the large gravel parking lot types but will have partial or full hookups, but not many have 50 amp service but some do so check their ads or give them a phone call ahead of time.
Before going to Alaska or Northern Canada, , spend time thinking and talking about your interests and what you want to see and do. Some people like to fish and others don't care to wet a line. Photography is a biggie on many visitor's agendas, some mainly of wildlife others like mountains and general scenery shots. As a person addicted to northern travel, prior to each trip, I go through my old photos to see what I have missed, which shots need to be replaced due to poorer quality, etc. then I pick a general theme of what I want to photograph. One trip I concentrated on Alaska Hwy roadhouses. For me personally, having grown up on a ranch in dry southern Oklahoma, I find water, lakes, rivers hot springs, large mountain ranges fascinating. But for folks from the Pacific North West, generally are not as interested since they live daily with water and mountains.
I don't believe it is possible to see all of Alaska in one lifetime, from personal experience. For just over 25 years, living in rural Alaska, I tried my best to see it all, but never saw over about 3/4 of it and most of that was in the air. I spent about one and a half years of 8 hour days, in the sky above Alaska, LOL. Did try to wear out 5 airplanes I owned, a half dozen RVs, six or so boats and a bunch of cars and trucks. So the point is, we all have so much time to travel and there is no perfect length of time to travel the north country. Use what you have and enjoy it. I have had numerous old people tell me they are sorry they waited so long to go to northern Canada and Alaska. (Old people are anyone older than me and I am 73 now ). For some, one trip is enough for them, others like many of us on this forum are addicted to northern travel and make numerous return trips to Alaska.
Reminds me of being asked by a 30 year old what I thought of their starting to college since they would be at least 34 years old by the time they graduated. My reply was, how old will you be in four years if you don't go Bach to school. Don't put off a trip to Alaska because everything isn't perfect, time available, money, as you may find out your stars never will align for going.