You said you contacted the club. Was it
JASON JUDT
NORFOLK NE 68701
Phone: 402-379-9242
email: [email protected]

I'd be persistant if possible unless they are just refusing to cooperate which I can't understand as that is not typical of the way modelers behave. Use the phone, you will be able to tell more in a voice than an email.
You can find rude store owners anywhere also.
If they field isn't chained off or posted "private" then one might assume that it was OK to fly there.