My wife purchased an Allstays app for the I phone while we were in the bus all summer. I think it was about $4.99. It was an invaluable tool while we traveled through the eastern U.S. We more than saved the purchase price on the first campground. It was helpful for low bridges, too. The Walmart locator was great. Check it out:http://www.allstays.com/apps/camprv.htm
I have no interest in the company, just really found the product helpful during our 5000 mile trip. This is the first trip out for us with an I phone. I kind of wonder how we ever did without it. We switched to Verizon in June before we left and had really good service throughout the trip. Next summer will be Colorado, and we get to see how it stacks up there.
All this technology makes the RV books collect dust in the drawer. We did however, use "The Next Exit" quite a bit while on the interstates. That is still a good tool to keep in the rig.