Stay away from large quantities green wood, and accept as little white oak as possible - though it is difficult to avoid it entirely. Use a shed, or buy a prefab wood crib. The actual cause of creosote condensation, is the surface temperature of the flue in which the flue gas comes in contact. This condensation is creosote build-up. If the wood you are using is rain logged, or green, the fire will tend to smolder.
Wet wood causes the whole system to be cool, and inefficient.
A hot fire means a hot flue, and a hot flue means much less creosote. The results were surprising. Contrary to popular opinion, the hardwood's, like oak and madrone, created MORE creosote than the softwoods, like fir and pine. The reason for this, is that if the softwoods are dry, they create a hotter, more intense fire. Because it is moving faster, the flue gas does not have as much time to condense as creosote inside the chimney.