We stayed in the same section of the parking lot as R. Green. Make a left at the top of the hill. This section of the lot is roomy and doesn't appear to get a lot of use.
The casino is on the small side and it's easy to overlook the second floor which is entirely non-smoking. No good VP machines.
We didn't stay at the campground but did drive through to check it out. It's very nice - paved pads ,room between the sites and well tended but the prices are high. It's $51.00 a night, $25.00 for off season. As far as I can tell that includes use of the warm spring swimming pool. Also there was no one manning the admissions booth and a sign that said to park in the overflow area in the campground and register in the morning which means no hook ups for the night since they don't want you to take an empty site.
The casino is off of US 26. We were coming from the north and spotted a sign directing us to turn left on Simnasho-Hot Springs Road. This road changes names a few times but it parallels US 26 and is a much nicer route so if you're continuing your trip north or south take this road and you won't have to backtrack to get back onto US 26.
The Kah-Nee-Ta Casino in Warm Springs OR. is quite beautiful. The river running down below with the RV Park and TeePee Camping with the golf course. We stayed in the parking lot at the Casino for the night and it was fine. It's the lower parking lot furthest from the front of the Casino.
We had dinner in the restaurant and it was very good. We really enjoyed our stay there and would go back again if we get the chance. Everyone is very friendly and helpful. The Casino itself is so different the way it sits and the color is lovely. It sits out by it's self in no where land. I was quite taken with the whole area. It's just beautiful. Happy Camping.