I've biked up to Alaska, the Yukon, and the NWT a half-dozen times. I am familiar with all the routes you have mentioned. September can be pretty wet. Since temps are declining it can make for tough riding. Nothing quite like day after day of cold & wet. Then again, you may have simply beautiful weather. The past few years have been bizarre. Like right now - heavy rains in mid-summer in California during the middle of a prolonged drought.

With the advent of RVs and more self-contained units, the number of roadhouses on the Alaska Highway has been declining. When I first rode up to Alaska almost 25 years ago, there were roadhouses every 20 or 25 miles. A lot of the smaller ones are gone now - which makes it tougher for the cyclist. Plus many of them shut down soon after Labor Day - Labour Day in Canada. You are never more than a day or two's riding from some service - even on the Stuart-Cassiar Highway, but that day or two can be pretty darn cold and wet.

And black spruce offers scant cover from the rain. I can say from experience. They are the scrawniest little trees. They get a little bigger as you head south. I'm from Wyoming - probably the closest thing to Alaska in the lower 48 - but it doesn't necessarily prepare you for Alaska and the Yukon. One of the things that might prove unexpected is the difficulty in finding a campsite. The ground is often muskeg and/or with significant downed trees. One possibility - esp. on the Stuart-Cassiar is to use the apron of BC provincial rest areas. Although signs say "No Camping" they are often the best choice for miles - usually dry ground, mowed once or twice a season, and with an outhouse. Sand/gravel bars on streams are another possibility. Heavy runoff in spring produces wide, braided stream beds that are well-exposed by fall. Plus, there is usually lots of driftwood for fires.

Safe trip - - J