Howdy, maddog. I haven't been down (or up) the Alaska Highway in many years, so I can't really comment on it, but I think some other Forum members have. I biked the Cassiar last fall, from Whitehorse to southern B. C. The Cassiar is now paved all the way (I think there was one mile unpaved north of Iskut) and was in excellent condition. Your primary concern will be motels and such, and fuel, but if you plan a little, no worries. The ride from Prince George to Smithers/Hazelton area is splendiferous. Farms, mountains, rivers abound. Very scenic. Once past Hazelton, things start to spread out. Stewart is off the beaten path a little, but good accommodations and fuel. Nice drive in. Going north from there, you have Bell II (very pricey and snooty) with gas, Iskut with a decent motel, Dease Lake with gas, food and lodging, then up to the junction with Alaska Highway and east to Watson Lake for an overnight, or kick it on west to Rancheria or Teslin. Do NOT stay at the Beaver Post Lodge just a half mile west of the junction. Rip off place.
It's good road all the way. Watch for animals on the Stewart-Cassiar. I would take at least a 5 liter container of spare gas. Hope this is helpful. R ::001::