Water is "devious" it will travel many feet, ask any roofer.
It could run down inside a wall, not causing damage till it gets to a low point, where it will pool.
Start a general inspection with the ceiling, vents, AC unit, clearance lights, slides any and all roof, penetrations.
Walls next, windows, tail lights (that's where our was) and the slide.
Floor last, you guessed it the slide is a good source of water, that's were our class A had a leak, slide topper... never did figure out how it got in the over the bed storage but resealing the topper stopped the leak
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