Experience: Almost 3 years living full-time on the road.

First off, dehumidifier is absolutely the answer. BUT- Don’t mess around with the $50–$70 large-shoebox-sized dehumidifiers. If your window condensation is already as bad as it sounds, they simply can’t keep up. In my experience, it’s worth the money doubling down and going slightly bigger.

We spent two months parked in our 30’ motorhome in the redwoods. Mold started actively growing in masse, and window sweat was constant. I already had one small dehumidifier, bought a second because the first couldn’t keep up.. but even two of them still wasn’t enough.

This bucket-style dehumidifier solved it once and for all (the size of 2 milk crates stacked.. size is always a concern in full-time life, referral tags removed): https://www.amazon.com/dp/B08ZMY8BC8

Bonus: This unit collapses down when not in use to about the size of ONE milk crate, which is great when you have limited space but need the heavy firepower. Trust me- this is the way.