Rinse turkey, then slide butter pieces under skin around the breast area.
Season turkey inside and out with BBQ Rub.
Fold wing tips under themselves to form a “platform.”
Place in a pan, uncovered, in the refrigerator 8 hours or overnight to allow turkey to marinate and skin to dry.
Remove from fridge, stuff cavity with herbs, onion and lemon, then place in 250 degree smoker, using apple or cherry wood.
After 2 hours, remove from smoker, place a meat thermometer (with an external reading) in the thigh, being careful to not place it touching a bone, and wrap fully in heavy duty aluminum foil, then return to smoker. As the thigh temperature gets close to 170 degrees, check the breast temperature with another thermometer. It should read about 10 degrees cooler. After the breast achieves 160 degrees and the thigh reaches 170 degrees, remove from smoker, place in an insulated cooler and allow to rest.
Check the temperatures after 15-20 minutes and ensure the breast temperature rose above 165 degrees (safety zone for poultry).
Continue to keep in cooler until ready to serve. Turkey may then be placed on a platter for carving at the table, or my preference is to carve on a cutting board and plate the meat on a platter for serving (much easier than trying to carve over a table!)