If you base your daily budget on what I usually spend you will end up on the higher side. While I don't go out of way to spend as much money as possible, there are some things that drive costs. I don't "stealth camp" or put much effort into finding free camping. If it's apparent, I will take it, but I am not going to roam around town knocking on church doors, etc., looking for a free place to pitch my tent. I eat breakfast out and often buy something prepared for lunch. I usually cook dinner and make much more elaborate meals than Ramen noodles, and I have wine with dinner. And I won't pass up things like a local "delicacy" because I would have to open my wallet.

It all depends on how you want to do it. Region can also have an effect, especially on camping costs. Private campgrounds in my neck of the woods can run you $30-$40/night and up. State parks in NJ are $25/night. It varies in PA, but they are often high teens to mid-20s.