If you're a person who thinks ticket prices make it too costly to travel, try buying this $60 tent, packing up your car, and driving over to the next state. You just might find yourself in another world.
Sometimes you can camp for $10. Sometimes you can camp for free. Sometimes it will be too windy to camp and you'll get to sleep in your car, which could have been free, if you hadn't already reserved a campsite.
However you choose to sleep in the great outdoors, get out there! There's a lot to see.