There is a really nice one about 20 miles north of Spokane don't remember the name but definitly the best one in the whole area. It is in a gated community and has an 18 hole golf course along side of it. Some of the buy in sites are 90 feet deep and are owned by Canadians but I believe you can rent them.
Capt. Are you thinking of Deerpark? I have seen some lots like you are describing.
There is a couple of nice RV Parks by Cour d Alene but hard to get into ( need to book early) and pretty pricy but very nice. We have not made actually stayed in them because of no vacancy when we were in that area.
I have stayed at Wolf Creek RV park on the. East end OD the lake but it was a small park and that was 14/15 years ago. There is also one on the North end of Spokane that we stayed at that used to be real nice but I think it has deteriorated.
There is a new resort just South of the Silverwood Amusement Park, which is North of Couer d'alene I would guess 15 to 20 miles, on Hwy 95, I believe the name of it is Ravenwood Resort. Silverwood also has their campground On the East side of 95 across from the park
I don't know anything else about the RV Parks, we drive by them when we are going to the big city.