I find that the cooler weather makes it easier to keep the temps steady. On hot days I have to turn the burner down so low that a little wind will snuff it out. An annoying and dangerous thing. I use water in the pan.
I make sure the chunks and chips are not tossed directly over where the flame hits the pan , I arrange them around the edges for less white smoke and more thin blue. I use a welders blanket around the smoker for a much evener temperature. Plus the blanket allows me to use far less fuel.
I sometimes use charcoal mixed in with the wood chips but I really don't know if it helps or not.
I bought one of those in line pressure guages for my propane tank $39.00 I got it at Home hardward. These work really great and instantly tell you if you have enough gas to complete a project. It is not fun running out 1/2 way thru a smoke. I had to switch from gas to charcoal to finish a butt once when my guesstimate was way off. It came out fantastic but could have been a disaster.
I hope too see some qview of your smoke. Good luck.