Hi there
I have two royals and I keep my humidity between 60-70% and 75-80 % when shedding.
I keep my bark moist and I have two water bowls inside the viv, one of which is placed directly under my lamp.
I have a Zoo Med humidity gauge on the back wall of my viv and it is extremly accurate. It is well worth investing in one if you havent already.
Hope this helps, however you should do whatever you feel comfortable doing and just use other information as a guidline.
Indea