I ordered a little clip fan that just clips onto like the arm of the tent and I leave it on 24/7, I had very high humidity my nights but I couldn't see any I'll effects from it, my humidity was jumping like 30-40% when lights went out, but I think having the fan blowing on the plants 24/7 really helped , I didn't need to buy a Humidifier or dehumidifier in my 2x2x4, I use the carbon filter as a cooling method..
Plants are looking good!
I'll attach a picture of some that should work nicely for your tent.