After quite a discussion about the situation and being told we could not park overnight, we left. After following him and pulling into the lot he stopped and said he was just informed by his boss that they do not allow any overnight RV Parking. Shortly after parking there a Security Person came to our door and told us we needed to park in a lot by a building across the street for overnight parking.
Two days later, when we arrived with our Motor Home, we parked in the area where the two different Security Personal had told us to park for the night. She went outside with us and pointed to the area for RV Parking. While our RV was being serviced in Grand Rapids, we drove our Jeep to the Casino and verified with the Security Person at the door where we should park our Motor Home for staying overnight. He said it was allowed and explained to me where we should park. I called the Gun Lake Casino and spoke to a Security Person a week before we were going there with our Motor Home and asked about overnight RV Parking.