In my experience the vapor is very thick outside in the mist container, but I found out that by setting the duct at an angle I could really control the amount entering in the tent.
I then checked what was going on inside the tent, only to find out that I had no risk of water coming in, neither depositing moist on the wall or on the plants ^^
Only a fresh, cool, breeze of air, just what I needed
Of course at some point I had to up the amount of vapor, but with the same result, which was good.
Anyway one needs to have a good air flow in order to avoid any problem, being exhaust fan or moving air around.