You might try google.com and type in Idyllwild Chamber of Commerce. They probably have info. on Pine Cove Tavern.
I spent many hours at the tavern in the late 50's and early 60's playing pool with friends. The tavern was on the side of Idyllwild Mt. that had a hwy. going down to Banning, Calif.. On the other side of of Idyllwild there was Taylors Tavern on the hwy. going down to Hemet, Calif.. Since the tavern owners probably knew each other prehaps you can get some info. from people who have owned Taylors over the years.