webers3

It does sound like the problem I am having. Discoloration on the sides and below indicates that there is a water leak on each side resulting in water accumulation at the lowest spot between where the floor is level and then slopes toward the rear. Water leaks through the tail lights was a very common problem on my year model (2017), it was addressed on the later models but I am not sure which. I would start at the tail lights by removing the trim (fairly uncomplicated) and sealing the area where the wires enter the camper, sealing the screws that hold the handles and then once you reinstall the trim sealing the edges of the trim and the body of the camper. I have done all of that but will have to wait until next season to see if it worked. It took a long time to dry out the area because it appeared that lot of water accumulated under the floor. Good luck