Lamar City Park RV campground is as bear bones as it gets.  The area is just a grassy area where RV/Tent camping is allowed.  A restroom is available as well as one water faucet.  If you want a picnic table to use you can take a short walk over to the park as one is near the RV campground.  The park is quite nice.  The city swimming pool is next door if you want to swim or possibly shower.  The park is a 5 star park, but the camping area is not much to talk about.  Camping is free the first night then it is $20 a night after that.