This time, I have fall weather on my side and I'm prepared for some serious experimentation.
experiment #1: apply tea tree oil over night, and use a Tom's of Maine deodorant by day.
Fail! The tea tree oil's anti-bacterial properties certainly worked their magic, but the oil itself was too drying, to the point of causing a rash after two weeks of nightly use. Tea tree oil's beautifully woodsy smell is also a bit overpowering and likely to send sleep-time playmates running. Not to mention, have you seen the price of organic tea tree oil recently?
The Tom's of Maine wasn't strong enough on it's own, even in particularly harried winter days, so I tempered daily use with carrying around a stick of Secret for emergencies. Far from ideal and not sustainable for summer use.
experiment #2: home-made deodorant à la Ms. Mihow. Seeing a kindred spirit raving of success, I've mixed up equal almond-scented shea butter, coconut oil, corn starch, and baking soda.