I'm trying to plan a road trip from Atlanta to Yellowstone. My finances are very limited and I have never made that kind of drive before. The most expensive part of the trip is going to be lodging and I'm considering sleeping in my truck on the way out and back. I have enough money to get a place when I get out there, I'm just trying limit my spending. I know that this is going to be a silly question but has anyone ever slept in their car on a trip like this? I'm not sure where I can safely park my truck at night. Also, how many days can I expect to drive each way? I'm obviously a novice. Any help would be greatly appreciated.

Thanks!
Chris