Allstays is a really cool travel app. It shows you where you can stay overnight…aka which Walmart parking areas are free, which parks are good stopping grounds, and which campgrounds are open. We used it going camping along the California coast. In addition to showing every possible type of place you could camp, it shows the prices of each place, what you might see when you get there (deer, lakes, naked people), and all other useful details. Check it out!
Their website: Allstays