We made late reservations to go camping on Memorial Day weekend with another family, and were only able to get a full-hook up site even though we were tenting. There was a $10 per night add-on fee for the holiday, plus $4 per night for third child. The site was very uneven and not really suitable for a tent, would have needed a good raking/shovelling to get an area set up for the tent, but we did not bother. Ended up with most of us at one end of the tent by morning so it must have been sloped more than it looked. Staff was trying to keep the bathrooms clean, but it was an uphill battle with the number of campers using them and the soil type in the campground. Bathrooms in our area were individual bathrooms with shower, toilet and sink, very modern and lots of hot water. Plenty of activities for the kids, three pools including an indoor pool, decent rec room, brook for the kids to explore. Lots of seasonal campers and golf carts, and lots of smoke. Not much to do in the area. Roads are unpaved and crowded, some sites are in a field, others wooded. Some of the wooded sites looked like they would be difficult to get a trailer into. There were some large seasonal trailers in the CG, no clue how they navigated the roads to get them in.
Stopped along the way to/from Yellowstone after departing Salt Lake City. Very scenic lake, but this campground is about one mile from the access road to the beach. Very typical KOA with little shade, lots of pull through sites close together. The bathrooms were individual shower/bathroom units in a nice building. Warm pool, mini-golf, well stocked store, RV wash at entrance. Staff was very friendly and helpful. Only drawback was the group of drunk college kids on an end of summer binge right next to us on the last night. Host family was on our other side and did nothing to stop the hooting, hollering and obscenities when they got back from the bar in the middle of the night.
We chose this site based on reviews that it has many trees and shaded sites, and were not disappointed. We reserved a pull through site for a 29 foot travel trailer and got a great site near the end of the access road loop. This ended up being the only way in and out of the site, as we had to back out, no way to "pull through" the c-shaped site with the bollards placed along the road to keep people on the pavement. However, plenty of room to back out. Sites are situated in loops on the side of a main access road. Be aware that they are one-way and plan for a sharp turn to go counter-clockwise from the access road. We needed to swing wide into the other lane on the access road and use all of the intersection to make this turn. Sites are moderate sized (large compared to private CGs, smaller than some state/national parks). Firewood is plentiful and about $7 per box. You are allowed to pick up deadwood all over the park (still plenty after the forest fires). Lake is too cold to swim in and swimming is only allowed in certain areas of the park. There is so much to do that we did not make it to the Ranger activities, but they looked interesting. Pleasant people all around. Drive to pay shower area, but bath house was clean and modern. This CG is not far from Grand Tetons, made 2 day trips there. Recommend spending at least a week in the park, half in this CG at south end and half in either Canyon or Madison area.