one thing, too, you may want to set up some parameters around drawing because it can bring up stuff. so for example, if you or the littles draw and strong emotions come up, you can come here and post or chat.
I do a lot of art with the system and early on it was problematic for a bit.
Last night the monster stayed out with her bf an extra night so this gave me the op to paint all night if we wanted... we painted til 1:30am and one (the last pic) was a little pic and it did bring up strong emotion. It could have led to si but we now have a "t-part" that internalized a fantasy t who is always there when needed. so that "t" walked the little through various steps and helped get the system back on track.
we also have coloring books for times of overwhelming emotions. so when things get too much, or drawing/painting brought up bad juju or the night is suddenly scary, the littles can get their coloring books and crayons until they feel safer.

oh was gonna tell you - reading your original post, it was like we were in the same session!!! my t last time talked mostly about PTSD and how i fit all three catigories (who knew there were catigories?!) and how we need to work with all of them to heal... and always has me imagining a field with an oak tree in it... sometimes be the tree.