We had wanted to get a site at the north fork, but ended up with a no hookup site at the lakeshore campground as that is what was available.  Note of caution, it can get very windy here, with strong gusts.  Our staked canopy actually flew off while my wife and kids were relaxing in it and almost flew into the lake.  Staking fail in me, but please be prepared.  There isn't a ton of shade or privacy, but the sites are spaced well enough.  Primitive vault toilets, not water.  Being down by the water was very nice, and the night sky was full of stars.  We used this as a base camp for Yellowstone; also be warned the east entrance road is quite windy, and it will take an hour or so to get where you want in the park depending on traffic.  This camp is located close to Cody, so supplies and a good meal (BBQ, prime rib buffets etc) are minutes away.  The Buffalo Bill Dam visitors center is actually quite well done and worth a pit stop.