We had drums at our judging class.
The general thinking I've Heard (not as a cook) is thighs and drums are easier pieces to retain moisture.
I have also read here that Jim Minion for one would not hesitate to turn in breasts, does, and does well with them.
But I think you should go with drummies or thighs Neil, to nail down the moister cuts first, before going to the trickier stuff.
JMO from the patio next to the pile of drummy bones
Statistical Anomalies render some statistics meaningless. +/- 3 standard deviations
Bandera, M-BGE, WSM, Gold Kettle, Kenmore Gasser, 36Qt Turkey Fryer, ECB, Dutch Oven