There is no parking LOT right at the statue. Superman stands at the old courthouse in the town square. There is parking for cars all around the square. HOWEVER, to Superman's right is a bank with parking. Hardee's has parking and to his left on 7th street across from fire department is Sav-a-Lot, which has a good sized lot. That lot is a few blocks away, but you will get to pass some Superman related items along the way, like the Superman museum.
Its a quaint little town. Just park on the square. Only 6 people will be inconvenienced in any way.
Depends on how big is your RV
There is a big parking lot right by the statue I'm sure you would find parking
There is parking all over the little town I'm sure you could find a place close
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