Buffalo Crossing RV Park West Yellowstone

Have you seen this campground ( I Have) it is really just a parking lot.

Ditto. It's also a bit of a drive from the park - it's really more in Island Park than near West Yellowstone. Have you checked all the other possibilities? A couple that look nice and/or we have stayed there: 2 different KOAs a few miles west of West Yellowstone, Henrys Lake State Park (Island Park, Idaho), and Grizzly (our usual choice). And that's just a few of them.

As for your original question, sorry I can't help with that, as I have never dealt with this CG. I would guess they are still closed for the season; they may be opening up toward the end of this month.