I might be coming late to this discussion.
You have to make the trip you want to make and no one knows better then yourself if you are up to it.
Lets say up front that the British Columbia, Yukon and Alaska part of your trip are spectacular.
I would like to bring a few things to your attention from my experience and you do with that what ever you want
I made the trip into Alaska in 2018 the last 2 weeks in June and the first 2 weeks in July
I always travel solo.
All my rooms were booked in advance for the simple reason that the smaller towns I wanted to stay in would be booked in that time period.
If you are camping most of the time this should not be an issue.
The following is not meant to scare, just something to be taken seriously.
In the Yukon and Alaska, if you are camping, you need to be aware of all wildlife.
Bears are real and nosy, they will smell food many miles away and will pay a visit if they deem it necessary.
Have bear spray handy at all times after you park the bike and go for a walk, set up camp etc.
I was in Alaska again last Summer and it has been my experience on both occasions that the bugs are not nearly as bad as mentioned.
I of course come from Alberta and we are used to bugs here.
That trip by the way I saw 36 bears. Black and Grizzly
The roads were fine for the better part, with the stretch after Destruction Bay towards Tok AK
being the worst.
In the Summer time they will always be working on the Alaska Highway, fixing stretches.
In those areas you will have to wait for oncoming traffic and can only ride on gravel behind a pilot truck for sometimes 5 - 10 miles.
In those instances it can be very dusty and in case of rain, very slippery.
The gas situation is as mentioned, fill up when you can.
Do not waver from that philosophy.
Be aware that half your riding days in Alaska, don’t have to be, but can be rainy.
Those are the miserable days that you want the ride to be over and if camping is at the end of those days, the misery will continue.
Everything will be wet and be hard to dry for the next day.
Even if you were to hotel it, your gear would have a hard time getting dry.
Riding to Anchorage starting in Dawson Creek BC all the way to Anchorage going through Fairbanks is both wonderful and very scenic with plenty of opportunity to watch and view wildlife.
I would like to suggest when coming back from Anchorage, ride up to Watson Lake and then take Highway 37 South to Highway 16
This is a beautiful ride about 450 Miles long.
This stretch has the least amount of gas opportunity, however, I have ridden it 3 times and if managed properly should be no issue.
If you have the chance and time, take the road to Stewart BC.
It is 35 mile ride in, ride out with spectacular scenery.
After you hit Highway 16 you are pretty well into a more populated area.
I hope that you do make this trip and have as good a time as I had.