We stop for just an overnight in Bismarck. We don't use to many KOA's, but it was about a half mile off I 94 where we where traveling. We called another RV Park several times to see if we could get a site, but they never returned our calls. So we called the KOA and they said we would have to go into overflow. Seems like sites were at a premium in the area. The overflow was on grass. It was a long and wide pull thru. We only use the 50 amp electric and just run off our tanks when making an overnight stop. We had a 10% off coupon for KOA and our cost was $30. A good price for a KOA. It looked like a very well maintained park. It was a good overnight stop with a very short off and on to I 94. It is big rig friendly.