“Remote areas are precisely the locations the natural accumulation rule protects because the reasonableness of monitoring remote areas of property, and lack of notice resulting therefrom, demonstrates the rationale for the rule. Where it is unreasonable for an owner or operator to continually monitor an area, such as the remote well site in rural North Dakota, it is unreasonable to expect the owner or operator to promptly clear any naturally accumulating snow or ice, …” Justice Jerod E. Tufte wrote for the court.