first butt on otg. any advice

I am preparing for my first butt on my kettle. I have charcoal set up around the side 2 wide and 2 high with wood chunks on top. (see pic) I plan on adding 8 lit coals to one end to get started. I have a larger rectangular drip pan that will it on top of the round in the bottom.

I understand my target temp is 200 cooked at 250. It is a 7lb butt so am planning on about 12 hours.

Any and all advice is welcome.

Thanks for the pointers.

Butt went on at 4am. The charcoal snake worked perfect. It burned for 11 1/2 hours before i added a few more unlit coals for a total cook time of 12 1/2 hours. Wide open top vent and about 1/4 open on the bottom and i didnt have to touch it all day. The temp stayed between 240 and 265. It stalled at 175 and actually came back to 173 before climbing to 198. At this point the bone almost fell out when i wiggled it. I nto the cooler it went for about a hour.

It was delicious and worth getting up early. I would have liked a little more bark. Maybe i will change my rub next time.