Like stevezzz, I have traveled extensively in the wild without aid of Superchargers, and think a minimal fee for equipment, installation and use of electricity is fair and appropriate for the business owner.
I want them to make a profit and remain a viable (open) business for the next time I or a fellow EVer travels that way.
And if the fee encourages their local competitors to add that type of convenience, so much the better.
While traveling through Utah last July before the Supercharger in St. George, UT came online I checked with one of the RV parks.
When I asked, they quoted/wanted what I felt was an outrageous amount.
I checked a bit more, and found a Best Western that gave me free charging for a couple of hours.
Turns out, they were not the only game in town.
For every capitalist, there is competition.
If somebody tries to gain too much too quickly, the market place will level the playing field.
Sometimes quickly, sometimes slowly.
I also look to that far-off day when chargers are plentiful and a part of every new construction project and parking garage.
In the meantime, I just intend to be a smart shopper and keep on charging where it makes best sense.