[JRTJH]

If you're seeing condensation on the windows, it simply means there's "too much humidity" inside the trailer. What you don't see is the condensation in other areas that can damage or even destroy your RV.

Places like where the mattress touches the exterior wall, behind the sofa, inside the dinette storage areas (along the exterior wall) are all "cooler than the air inside the trailer" and the moisture in the air will condense in those places, make things "wet" and set up a perfect mold growth environment.

Also check under the mattress if you have a passthrough storage area under the bed. The passthrough is much cooler than the trailer interior and there's little/no insulation in the roof of the passthrough section, so under the mattress stays cold and that sets up condensation under the mattress and inside the bed storage area.

If the windows are wet, you really need to be pro-active to keep the above areas dry or you'll discover some significant mold issues in the spring.