We have had lots of rain here recently in South Florida, and have our trailer in an outdoor storage lot. W have some water damage in the left, back, inside corner, behind the Queen mattress. It is on the plywood decking and wall.

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We have a 2014 R-Pod 178.I'm wondering if the caulking at the seam on the roof between the roof and the sides needs to be replaced or infilled. I do see some small cracks in the caulking in places. I don't think it is the rear window, as the seal around the window looks good. Does anyone have any experience in recaulking this roof seam?
I worry that it may be more of a project than I want to start.
Thanks