For "camping" I've only stayed at the Wilderness. I will say my husband and I drove through ALL the other "parks" in the area and to us none of the rest seemed as good.
I like that "some" of the camping sites at SDC are VERY large. I will say though even when we tent camped (we have done both tent and trailer) we would upgrade (since we always have SDC passes) to the sites that offer electric and water. (it may be trailer sites, in fact I'm quite sure they are). We book one year early, when we camp there. And we look at the map and pick the site we want. You can reserve what ever site you like. We for conveince of being next to the bathroom did like one site near the top by the bathrooms (not the store, the other bathrooms! lol) it was right across from the bathroom and a large enough camp site, but during the day it got full sun and our pet bunny couldn't take the heat! lol haha It will be a site we would rent again with a trailer with AC though! Any way we looked around and liked a HUGE trailer site on the other side (closer to the cabins, at the bottom of the hill), it was far from bathrooms but not bad, we liked having the huge space. The bunny got to run around a bit each day there. lol
When we looked at other camp grounds it seemed all the sites were butted right next to each other and you were like stacked on top of every one else! We didn't like that. We also liked having more grass the gravel.
And the bathrooms are top notch at the Wilderness, EXTREMELY clean and maintained.
Also when we go we end up staying at least a week (cause we have been living in NYC till this year) and usually actually three weeks as it is such a long drive we just use all the vacation time in one shot and stay the whole time there. Any way, there would always be rainy days, (heck even living close it seems like I never escape the rain there! lol) any way the game room was always a nice option of going to during the rain with the kids. And like was said if you forgot some little thing it was nice to just get it there even if it was more expensive. And, they used to give free coffee if you bought their mugs, but I'm not sure if they are still doing that in the wilderness mugs or not. One thing we did like though was the FRESH hot bakery stuff from SDC in the morning, came straight from Eva's and Delila's (sp) bakery at SDC there in the mornings. mmmmm nothing like starting the day off with a danish from the bakery! lol And not have to stand in line for such! lol