First the staff was very helpful and friendly. The park is very small. We had trouble getting our slides out without hitting side partitions, between the sites. The website shows deep green grass at each site but all we had was dead grass and pet waste. Of the 8 sites 6 where occupied by long term, older rigs with lots of clutter. The park is behind the Hotel and as such is a little hard to maneuver into with a big rig (39ft), but it did fit. We did eat at the hotel. They had a good menu but a little high for the quality of food. Staff was very nice and accommodated a late checkout so we could play golf. We camped here in a Fifth Wheel.
Union is a very nice, clean, small town. Recommended restaurants is Gravy Dave's (across the street) for basic home cooked food. There is also 24 hour WI-FI available at the library next door. Library hours are limited but WI-FI is 24 hour and you can access from outside the building. We camped here in a Motorhome.
The Union Hotel has a small RV Park behind it. It's easily passed by. We stayed there while working on the new windmills in the area. The park is all gravel with lots of shade trees. It's right next to the city park where there is a park, gazebo and horseshoe pits. There is a stream next to the park with a swimming hole. Deer come through the park every morning and evening and will come right up to your trailer. The people that own and run the hotel are absolutely wonderful. The shower is inside the hotel and you have to ask for a key, but it's a huge shower. We camped here in a Travel Trailer.