Have never used a water pan successfully in the pellet grill. The majority of the time it's low and slow water pan won't help you out at low and slow
I humbly disagree. Even low & slow there is enough heat generated that when I open the lid, I can see water vapor rising from the pan and the water level in the pan drops significantly.
Like I said, I notice the biggest difference in Wintertime when the air is dry here in NE Ohio. In Summertime I can't tell any difference.
I usually don't try to put a pan under the grate on the grease pan. I just place a small loaf pan or two in the corners out of the way.
Oh and this is important: I am sure to put HOT/BOILING water in them so they start producing humidity right away.
Never needed in Savannah, GA but sometimes I do put an empty under the meat pan to ease cleanup.
What Art said! Here in SE Georgia you don't need a water pan!
Yep, I truly believe the relative humidity where you live makes all the difference.
The smoke ring is a tell-tale sign of humidity level in the grill/smoker. Nitrogen dioxide is released from wood during combustion. Nitrogen dioxide reacts with water to form nitric acid. Nitric acid is what forms the smoke ring. Ergo, the more humid it is inside your pit, the easier it is for nitric acid to form on the surface of the meat, and the deeper and more pronounced the smoke ring will be.
Keep in mind there is moisture on the surface of the meat anyway, so you will always gets at least a small smoke ring.