It is a NF campground so yes the do accept the America the Beautiful pass. We stayed in July 2020 at $6 so paid $3. Looks like the price is now $20 and with the pass would pay $10z

It does take lifetime intergovernmental. Also known as Sr. Pass. Does not take Passport America. Not sure what America the Beautiful is? It is a forest service campground so won’t take other discounts.

America The Beautiful pass (annual parks pass) only applies to park entrance fees, not campground fees.

Yes it is where NortH Dakota ends and Montana begins Along hwy 94