It's a beautiful drive. Alberta is a little "vanilla" but still pretty ...and TIDY, so very tidy! Even the farms seem to line up and neatly park all the farm equipment. Weird. Then, you will be driving along and think, "somethings different," but you can't put your finger on it. There's just this tickle at the back of your neck that makes you feel something's off.

.......There are VERY FEW billboards in Alberta, which is a little freaky when you're used to being bombarded by ads along US highways. It's almost too calm, this lack of assault to your sensibilities, but you eventually get pleasantly used to it. (Then, of course, when you drive back the next year, the billboards in the US become offensive!)
If you go on the Cassier (sp?) Highway make sure you have plenty of gas before you start. It's 450 miles long and there is ONE gas station along the entire road. I had a slight scare on it last year, but made it just in time. The gas was horribly expensive, but better than getting stuck out in the middle of nowhere. I probably won't try that route again, but I did it just for a change and to say I'd done it. It was pretty, but it wasn't worth the drama.
I know people have probably told you this, but I'll echo their advice: get a current copy of The Milepost. It's the road atlas for driving through Canada and Alaska, for driving the Alaska Highway. It's more than that, though. It gives you information about the history of the places you're driving through and information about interesting sites along the way. It gives you information about border crossings and helps you figure out where you are in relation to where you're going. It also has a kph to mph comparison so you won't get arrested for speeding. My SUV doesn't have kph on the speedometer, so I found this very helpful. The Milepost is available on Amazon, and is worth every penny you'll pay for it.