Pill2Chill
Bluelight Crew
Thats how I am with Ketamine, if its my own.
Same here.
I am still pretty bad at controlling myself with opioids and benzos too, but I am very careful to avoid physical dependency.
So yeah, it completely depends on the substance. My sessions can last for days/week when I'm using downers/weed/ketamine but when I use stims it's never more than about 3-4 days (anymore). Usually less.