This was a longest illusion clicky camp for me. Multiple days/hours. Here are some observations.
1. As others have noted get the named to pop inside the tents so they don't wander off. This increases the Zed spawn rate it seemed to me. It took a while for me to get them popped in the tents, because when I'd log for the night someone else would roll through and kill them. But with enough time today I got them all spawned and Zed popped multiple times.
2. Zed can spawn faster than two hours. If all the named are up, he can spawn in the middle tent at the spot marked by Brewell's maps. He never spawned in either of the smaller tents. Only the big tent - in the one spot - and by the fire.
3. If you're high enough level to roll these level 37 mobs, just keep the poachers all clear. There are tons of tradeskill drops. So many in fact I had my druid box shuttle back and forth to bank and traders just to keep bags clear. Use the drops or sell them.
4. Once in a while, a poacher would fail to spawn in its usual spot. When that happened, Zed would spawn on the next cycle either at the fire or in the tent.
5. The Burnoose is very rare. I must've killed him 20+ times before it dropped.