What temperature do I smoke a turkey at?

I just procured a gas (BBQ grillware) smoker and the thermostat has numbers
where the old smoker had 'warm' 'medium' and 'hot'.

I smoke birds in the old smoker for 6 hours on medium but in the new own
medium would be around 300* Fahrenheit.

According to http://www.onlineconversion.com/cooking_gasmark.htm, 300* is
'somewhat moderate', not "very moderate" and well under plane ole
"moderate".

So, 300* sounds about right, right? Or should the temp be lower since I'm
slow cooking at 8 hours?

I cook pork (leg) shanks in the oven for 6 hours at 200*

I'm confused, puh'leez hep me

YM