Hello Jeni, I was there on 9/7 and there were a few empty lot for campers, RVs. Many of the other RVs had dogs so yes, Cedar Mtn is pet friendly.
When i was out there just over 2 weeks ago the lady i talked to said they were booked for the rest of the year. But who know maybe you will get lucky :)
Thanks! Your answer is awaiting moderation.