Don't know about the wise,but have done it a few times,and still have the old notebook ,Smokin' started me keeping.
Like you said,good notes do a lot to "make an experienced cook."
A couple more runs,and you should have a better feel for the cooker,your placement and temps.
Nice thing about butts,is they will cook to meet your schedule.
Sounds like you could probably have shifted a few around,still cooked around 225ยบ,planned on 16 hrs-worst case in the cooker,and still have a few hrs to rest in a cooler.
One of those 120 qt coolers from Sam's,would probably keep that many wrapped butts for 8-10 hrs,safely.
Sounds like it was a success to me.
Problem now,since you made it look so easy,all the neighbors will want you to do it.