I recommend getting a non-invasive
moisture meter. It works like a stud finder and measures the moisture level inside the walls. This will tell you how far the water has traveled and how bad it is. I had several places on my camper that were 100% and water literally dripped out when I opened the wall up.
There is a link to my Lance rebuild project in my signature. These campers are always repairable, the problem is it's not worth it to pay somebody to do it if it's older then 10 years. Remember that the average life of an RV fridge is 12-15 years, so consider that as well.
