Bones, when they reach the 190ish point and you 'let them set in the smoker' until you pull them; clarify that for me please. Do you open the smoker, double-wrap, power off the smoker, then put back in smoker and close door for the 'rest' period? Or are you describing something else here that you're doing prior to the 'rest' period?
Yes sir, I turn the smoker off about 190*, sometimes I "crack" the door open/close as fast as I can, just to cool the box temp to below 150* but most of the time, I just let the meat set in the smoker, no wrapping or anything. That is where I rest the meat. The smoker will stay hot for hours ( I am in south Texas) so I just leave it in there. Sometimes I pull, wrap, and towel then into the cooler...or microwave. DO NOT TURN IT ON!!!! I just use the small space to help keep the butt warm while it's wrapped.
I guess I have bouts of lazy kick in every now and then and when they do, I do not wrap or anything, just set the SI to a 140* to make sure everything is food safe and let it rest, or even climb in temperature until time to pull.