Mine where about like the smaller one you mentioned. FR replaced the sidewalls because once delam starts, it usually just gets worse over time. As far as I know there isn't any other fix.
You may also find hard bumps on the walls inside your trailer. Sometimes apperaing like a rash. The walls can also swell. The swelling may be hard to see, but if you run the palm of your hand over the wall you can feel it. These two problems are caused by the styrofaom insulation getting wet. Check around the slideout area. I was told this is where most delam problems occur.
Here's a pic of one of the bubbles above my slideout;
Linear Mode
