Hmmm....that's a tough call because once you start to 'explore', things can quickly evolve into a 'mushroom project' where as before you know it you have half he trailer torn apart. If you're handy and have the time that's the way to go for a good long-term repair. If you want to get out and go camping, leave well enuff alone until late fall or early spring when you can set aside a few days or weeks to mess with it. Perhaps open it up enuff to pull out the soaked ceiling insulation an put a de-humidifier in the trailer for a few days to help dry it out.