I just got a call from my insurance company telling me they were denying my claim because the damage couldn't possibly have happened so quickly, making it an existing condition. So I called the adjuster and he informed me he hadn't denied the claim yet and was waiting to hear back from the companies he had showed the photos to. I also called the dealer the trailer is currently at and they told me the damage was definitely from the missing vent and it was definitely new damage. Looks like I have a battle on my hands.