david, we look forward to having you join us! And bring your fishing gear. I'm bring my fly rods and planning on buying licenses for BC, YT, and AK. There's some great grayling fishing in the small streams up there, and with an inflatable raft I may try some lake fishing too, since we'll be spending at least one night on a lake shore.
I think there will be lots of combo rigs (HMV + camper trailer). Hotel rooms will be very few and far between on many of our stops so being able to camp comfortably will save money and save hassles.
I've got some questions in to Transport Canada to see how much fuel we can carry, and in what kinds of containers. I've heard from a Candadian friend that BC may limit us to five 5 gallon cans per rig. I wouldn't worry about carrying more than a pair of fuel cans for the small gas rigs at this point. The Planning Team will look at having fuel delivered to us on those days when we don't pass any fuel stations. Or we'll find a way to bring bulk fuel with us on the dry days. The big idea is that everyone should have enough fuel to drive 250 miles in one day. That is more miles than we will drive in any one day, but that gives you in-and-around mileage plus idle time. So if you can carry fuel (full tank and cans) for 250 miles, you'll be good for the whole trip.
You will need a Canadian Insurance Card from your insurance carrier. A quick check of a couple common companies tells me that they will issue you a card when you are in the quarter of coverage where you will be in Canada. All they need is 1-2 months advance notice and they will mail you the correct card. But they will not send you a card in February for a trip in August. I've got a note to call my insurance company at the end of June 2012. I'd recommend anyone talk with their carrier to see what they need from you to get you a card.
Plan on getting a passport. It's currently needed to return to the US/enter into AK for US citizens. A few states, like WA, have enhanced drivers licenses so you don't need the passport. My WA daughter has one so she can go visit her BC boyfriend without taking her passport. I believe Canadians also need a passport to enter the US (AK) and return. A quick look at the US or Canadian Customs web sites will let you know for sure.
If you are a good observer of financial markets and have very good timing, you may be able to buy a bunch of CA$$ for less. I'm thinking that I'll get one of those low-interest-for-6-months credit cards and use that for all my trip expenses. Then pay it off and cancel it before it goes to 19%. That will give me a record of all my costs during the trip on one card, and often the bank card exchange rate may be better than what a local merchant may charge if I buy with US$$. So when in Canada, buy with CA$$, or credit. Pretty much everyone along our route takes plastic, especially Visa or Mastercard.