Thank you all so much! We had an appointment to bring the trailer in today for the leak. (It is an active leak....dripping on the bed when the trailer is open).
Thanks to the person who suggested checking out the stove vent. I took a look at it before I left...I didn't see any cover. The people at the service place were able to confirm....cover was gone. We had a big hole into the trailer....right next to the outside light! I am THRILLED that this will be fixed! Hopefully, they can figure out where the water is coming from, too!