Basically, I load my 17" diameter coal basket, say, with 15 lbs or more of coals, + some wood chunks thrown in, then top it with abut half a chimney full of lit coals for the Minion and bring up to desired temp.
Nice thing about UDS's with their large coal baskets is that you can load the basket full and get 3 or 4 long cooking sessions out of them without having to pull the basket out, clean out, and reload with fresh coals. Sure, you can also go 20 hrs and hold low temps, no problem.
This is basically how most UDS's operate. I'm sure the snake method will also work here for slow burns.
Here's a pic of one of my smaller coal baskets, about 14" in diameter