I usually get a 12 lb enhanced bird and brine 9 hours, which is 45 minutes per lb as you suggest.
The more I read about brining the more I see people brining for 24 hours or more.
Yesterday I picked up an 18 lb fresh, non-enhanced bird. I know they say not to smoke a bird larger than 12-14 lbs, but since I ramp it up to 325-350 I figured a bigger bird wouldn't be a problem. Especially in the UDS.
My question is, do you think it will be okay to brine this bird for a full 24 hrs with a base of 1 cup salt, 1 cup sugar per gallon without it becoming too salty? And how long ideally should I let it air dry in the fridge once rinsed? Thanks in advance.