Inexpensive antennas are a dime a dozen.(Wah! I got a million of 'em! (Bad jokes))
Decent antennas aren't cheap (depending on what "inexpensive" means to you).
Not counting private campgrounds, state and federal parks tend to be in the country on the fringe of over-the-air (OTA) TV coverage. Directional antennas are better in this circumstance. In the winter as I'm plotting my summer trips I print out the radar view of each camp ground from TvFool. A good reference site and helps me point the antenna.
Learn to like shopping and foreign language channels. And 1960's cop shows. And TV preachers...
Gordon's list of antennas looks pretty close to my experiences..
Without adult supervision...
Quando omni flunkus, moritati.
I'm a man, but I can change, if I have to, I guess.