The humidity level with a CoolBot and air conditioner usually ends up in the 80% - 90% range. If the cooler is empty or nearly empty, it will be slightly drier than if it is more full.
Even in a dry climate like Arizona, coolers usually end up in that 80% - 90% humidity level. Outside it might be 25% relative humidity, but when you open the door and that hot/dry air comes rushing into the room, it very quickly cools down by 50 - 60 degrees fahrenheit. Therefore, that exact same air that outside measured at a relative humidity of 25% will now measure at a relative humidity of 80% - 90% inside the cooler. Colder air can hold much less moisture, so the humidity levels go way up. Physics is great!
If you need more humidity, you'll have to use a humidifier, and there is no conflict with running a humidifier and a CoolBot. Simple and cheap vapor humidifiers can even come with humidistats to measure ambient humidity.
If you need lower humidity, you'll have to use a dehumidifier - which means you'll have to account for the extra heat that the dehumidifier puts out (which just means upsizing the air conditioner a little).