In smaller towns, you can do better than $60 for a motel room. Many times you can pick up a motel room for $45-50. Watch for motel coupon books at truck stops and state visitors centers -- they help us a LOT! (Similar deals are on this website, if you'd prefer reservations.) When my husband and I were tent-campers, we would camp out for 3 or 4 nights, then take a motel room for a night, for the comfortable bed and a shower. It was usually something inexpensive.
National forests and parks shouldn't be more than $25-30 per night for one site, and many of them are still less expensive than that. The less popular the forest campground, the lower the price (or so it seemed to us). State parks vary, but in researching this not all that long ago, $15-30 for a tent spot seems about right -- except in California where the price will be $25 up. The beach state parks will NEED reservations in CA, unless you want to take a big chance, any time during the summer months.
Donna