Hi Cmmjmoore,
We live here in Arizona and have spend many trips at the campground in Grand Canyon Railway RV Park which is located in Williams south of the Grand Canyon. Very good park for a few days stay. If this is your first trip they have a railroad train that takes you from the RV park to the south rim. Fun if you like trains or have kids. The trip takes most of the day. They have packages that have bus tours when you reach the canyon and box lunch if you like. It is a fun trip if you get the day they run the old steam locomotive/ They also have the diesel ones too.
They have different cars but they are all air conditioned and have comfortable seats. Food and drink on the train is available. They also have a cowboy show while waiting for the train the leave the RV park for free.
They also have a hotel and restaurant and buffet at the RV/Hotel area/Railroad Station.
After you ride the train I usually drive into the park and do my own sightseeing. It takes about 30 minutes to drive the road to the gate.
You can also find KOA and other campgrounds that are closer but this one is also in the town of Williams which has many food choices and supermarkets.
Here is a link to the Railway RV Park to help you.
Railway RV Park
If you have any questions just ask away.