I find it interesting that the storage bins are wet, that would lead be to believe that the water is not coming in thru any leaking seals otherwise the carpet, etc would be wet and not the bins. I would be looking at the seams of the slide or even the windows (not sure how high the windows are in the slide on a 3100) to see if water is not seeping into the ceiling of the slide and then down the walls. I once had a slide leak and the manafacturer (Monaco) seperated the coach into two boxes. The coach was one box and the slide was the second and then went from there to determine if the slide interior walls were wet meant the slide itself was leaking vs's if anything around it was wet would mean there could be a leak on the coaches roof, or seal etc. Leaks are tough becasue water can come from just about anywhere and will follow the route of leats resistance. The bins being wet has to be a storng clue that Kermit will know the answer to I will bet. Best of luck! R.A.G.
