Just as the forum name implies, these are threads by people "on the road". Most of these trips cross many state lines and would be impossible to place in a single location. A good example of this would be moosetag's latest journey from Florida to California. The trip has covered over a dozen states and they are still a long way from home.
You could always go to the "on the road" forum and then search for a specific place you wanted to read more about. I did a search in the forum for Arizona and had 176 hits. If you search on Tucson, you can get that number down to around 75. It's still more then you want, but there is some good reading here.
If you are looking for campgrounds, click on reviews
on the top of the portal page. Campground reviews are sorted by geographic area which makes finding a location pretty easy. Don't forget to add a review of a campground you have visited.