Deb -
Perhaps a silly question, but have you tried enabling Wi-Fi Calling on your phone? If you have a decent Wi-Fi signal available (I know, unlikely in a campground), your phone is perfectly happy to use it instead of the cellular signal.
How do I know? We have a camp (that's Maine-speak for lakefront cottage) in north central Maine. Cell service is not available unless I drive nearly 5 miles. But we do have really great Wi-Fi service! Works like a champ.
Bill
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