probably obvious, but ensure you have a large enough drain bucket to hold the entire capacity.
I'm pretty insistent on a hot oil drain - my belief that the contaminants held in suspension in hot oil drop out pretty quickly and don't get flushed out of the oil pan once they do. One of my reluctances to using a fumoto valve as well - I don't think they drain fast enough. The other is I have this nagging mental picture of snagging that valve while off-roading and dumping my engine oil out in the boonies somewhere.
Edit - I know the actuating level is pretty secure - my concern is tearing the valve completely off the pan.
