The thing to do is to move the moisture outside, when possible. When that isn't possible, find a way to get rid of it. Excessive moisture is your enemy! it will kill an RV or at least make it unlivable quicker than you might think.
First off, get an electronic thermometer with a hygrometer like this one:
https://smile.amazon.com/gp/product/B00EW369VK
You need to be able to tell the humidity level in your RV. You want it to be below 55% and ideally about 45-50%. Anything above 55 and you risk growing nasty stuff.
Some good rules to follow, when camping:
Use the exhaust fan, while showering.
Use a chamois to wipe down the shower walls, then hang the chamois outside (move the moisture outside).
Hang the wet towels outside to dry.
If the humidity is over 55% and the air Conditioner isn't running, either make it run, or get a decent dehumidifier to remove the moisture.
If the dehumidifier can't keep up, I'll even turn on the fireplace (electric heat) to 71 degrees and then set the air conditioner to 70 degrees, until the humidity gets down to an acceptable level. Yes, it is that important.
Unless you are staying in desert of another low-humidity area, the damp-rid containers will not do a good job of keeping your humidity levels low enough. They will leach out a little bit of the moisture, but not much and not quickly. Get the item listed above an test it yourself.