When I want to note a camping area,gas,motel,etc.,I drop the way point then change the "flag" to what ever symbol I need,and put the description in. If the camping is a ways off from the track, I might put the camping symbol next to the track so I'll see it as I approach. Then I just add into the description something like "Lft on Hwy 79-Jenny Lake,Camping". That's one of the main reasons why I carry the atlas'. They show camping all over.
I'm guessing I'll average 200 mi per day. If I use that as a guide I can roughly figure out when I'll finish the trip,but I know some days it could be more or less. By having camping/hotels peppered along my route it allows me to find a place to sleep no matter when I'm looking for it. I've even found where the Dick's Sporting Goods & REI stores are in case I need more freeze dried food.
Your trip sounds exciting. Have you read this RR:BigDog/Dingweed: Winging It To Alaska , or
What you're Missing: a Guide to Side Trips off the Cassiar
These two were very inspiring to me-certainly the way I'd love to see Alaska.