From your current location there are several different routes. As Frank's best friend mentioned, take a look/read, at the Alaska/Canada section on this forum , pick up a Milepost guide and a copy of Church's Alaskan Camping guide also.
Then decide if you re going to stay west and go up to Prince George BC and up the Cassiar Highway to the Watson Lake area of if you want to go east out of Prince George, to get o Dawson Creek and the start of the Alaska Highway. The Cassiar tends to be more remote, more scenic, but a slower drive for me. Many travelers tend to take one north bound and the other on their south bound leg.
You will find many places where you can boondocks over night once you cross the Canidain border or there will be full service campgrounds in most all communities, large or small. We tend to use a mix, one night in a full service place and then a couple of nights in provincial campgrounds or just find a place to boondocks along a river or lake.
Depending on how many days you are planning to take from SF to JBER, you can make a leisurely trip out of it or just blast on down the road. I have done it both ways over the 51 years I have been driving the Alaska Highway. It is a great trip, one I am sure you and your family will enjoy.
joe b.
Stuart Florida
Formerly of Colorado and Alaska
2016 Fleetwood Flair 31 B Class A w/bunks
www.picturetrail.com/jbpacooper
Alaska-Colorado and other Trips posted
"Without challenge, adventure is impossible".