John, I went back in 2009 from Western Kentucky, so we aren't too far away from each other. I took $1,500.00 US currency, and $500.00 Canadian currency. I ended up bringing money home. We camped all the way there and back, except for one night that a campground we were going to stop in was flooded. I was gone 37 days. If you don't like raining and miserable, be prepared to budget about half of your trip in motels. I put almost all of my gas on a Credit Card, as well as the oil and filters for servicing. I changed my oil at the WalMart in Dawson Creek on the way up and back. Great bunch of folks working in the service department, they insisted on us using their drain pans and funnels. They wouldn't even let me empty the pans for them.
We cooked every meal except for the three times we splurged along the way. I also travel on the cheap and camp everyday, it's the only way I can afford to take longer trips. I ate a lot of Oatmeal and Ramen noodles along the way, but it's worth it for the scenery you will see.
I'm planning a trip back up there in 2015 with a good friend of mine, so I'm starting to research early.