Congrats on the new addition, you will fall in love with it.
I use lump exclusively in mine, don't be surprised if you find yourself having to close the bottom vents, mine, and most of what I've read, run that way.
If's it 8 years old it probably doesn't have a factory thermometer, did the previous owner install one, I installed mine in the lid and measure temps at the lid, that is usually 15° higher than the top grate temp.
I also installed Guru eyelets for my probes to pass through and I added handles to the sides to facilitate removing the middle section.
Have fun with it, mine will smoke at 215° for 18 hours and go to 350° to cook chicken, they are a great smoker.
Be sure to post some Q-view of that shoulder.
Gene