G'day Guerry... WOW that is a bit of a loaded question... But knowing the gear you've got, you don't need to really really go low and slow to get an awesome result. A leg of Lamb on the Dirty Girl would be absolutely awesome.
Go indirect, but use real good lump and go at about 300F until it's done.. about 135 / 145 internal. You'll get great bark and a majic majic majic smoke ring on it. Don't overdo the seasoning.. just EVOO, some lemon, Celery salt and Cracked black peper... Just sensational. You'll never look back.