If the pit has a constant 300º temperature across the grate, concider your cook to be a" turbo cook". The result will be less cooking time and just as good (by me) end result; good bark, well rendered and juicy..As there will be a LOT of fat rendering, make
sure the pit is well cleaned and the drainage system clear. Some of use a drip pan with a rack that eliminates the gunky pit and possible flare-up/fire problems.
I never wrap. Just cook it with a thermometer to constantly monitor internal temps..It should "stall" approaching 160º..When stalling, the temp lingers at that point and may even fall until it starts to rise.Sometimes there is no stall. You should be taking
notes as you go.
When it is done, measure the internal temp at several locations to make sure..This will be around 195º to about 205º. The" probe like butter" is the ultimate test. Temperature is a guide. Wrap and let it rest for an hour-Minimum,then pull..If you cooked
using a pan, the captured juices can be added to the pulled.
The bottom line:it takes TIME ! If you finish early just leave the meat wrapped.