I would definitely remove the paneling because I would want to know why and where the problem was. I will also mention that if you look down at the floor next to the bed closet side) you will see a small step up from the main floor. Our step piece with the carpet attached came loose and you can see the plumbing run through that part of the floor area. You may be able to prior that off and see if anything is wet in closet area.
Rick and Mindy
2013 Redwood 31SL, 2011 Ford F350 SRW, 6.7, Crew Cab with Firestone Bags, Titan Disc Brakes