We work in the area and stay for roughly 4-6 weeks. Owner is very accommodating, and helpful. We also have been staying in the Fort Benton area for the past 14 years, for work related purposes. The kids can play freely, and the locals are aware of the kids.
Best part is when the ice cream truck stops by.
Overall I would recommend this stay for the small town, there are activies throughout the summer in the downtown district. If you are expecting High end KOA or luxury park with a list of rules and strict enforcement this isn't it. Everyone knows everyone, and there is a mutual respect.
**I also want to add the previous review from a gentleman, never once came to a parent about the kids, asked the kids for privacy, or mentioned anything to the park owner until the next day, he also never moved a picnic table to his area, the toys he is referring too were around a trailer that belong to the families. The kids were in bed by 9, and were around camp for an hour. The kids may have been more loud than he liked, but it definitely was not past "quiet time" or after dark.