If you're on a budget, stealth camping is a viable option. I've often camped behind churches over the years, and local police will always direct you to the fairgrounds if you're in a county seat town. After a while you'll get really good at spotting good places to camp. Small town parks are good places as well. Churches and parks have the advantage of often having small pavilions, picnic tables and a faucet and electrical outlet. You'll have privacy and wake up not having paid some KOA their "resort" mini golf fee.