I wouldn't touch fields or canals.
The US has incredible amounts of parking lots.
They are also mostly built in very developed parts of the land with a lot of users for electric power in close proximity.
And a parking lot is already "sealed ground".
Might be less problematic to get a permit there?
Additional plus: cars don't heat up in the sun.
And at some point you might even charge EVs there.
Additional plus: cars don't heat up in the sun. And at some point you might even charge EVs there.