Bob,
As a camp host, albeit retired I can hear your pain. This has been going on for the past 4 years or so. Even summers park availability has been near zero. Couple of reasons for that. OPRD upper managment chose several years ago to put their available money into new parks instead of upgrading current facilities. So we now have underused parks like the monster in north central Oregon, while funds get cut to the rest of the parks. Its omly going to get worse in the near term as more people buy/try RVing. After Labor day most parks start cutting out their temporary help, so there are fewer employees. The end result close parts of the park.
BTW have you tried Stub Stewart yet?