Help with traveling the Beartooth Highway

Thank you all so much for such great suggestions. I'll check out the recommended campgrounds. I already called the KOA and they're booked for the time we plan to be there.....over July 4th. We may have trouble finding a place since it's the holiday. So if we have to go elsewhere, what do think of the idea of staying in Red Lodge for a couple of nights? It would save us the drive from Cody to Red Lodge when we want to drive the Beartooth, and since we'd be a bit closer to Yellowstone NP it may even allow us time to go inside the park a bit and explore that part of the park, which we've never been to. From the map it looks like there are pretty good roads for pulling an RV between Cody and Red Lodge.

I'll try to call some more Cody campgrounds this weekend. Pending what I find we may have to look elsewhere for campgrounds. So please let me know if there are any campgrounds north of Cody or up around Red Lodge that you like or would recommend.

Thanks so much. I LOVE this site!