I use wood block chinking and traditional mix daubing primarily, because that it is the completely correct way to restore, and truly the most healthy for the well being of the structure.
The wood block chinking used by the pioneers not only added needed insulation, but also added significant structural strength to the whole building. The logs often span 25+ feet from notch to notch. With nothing in between (other than nonstructural wire), over time, gravity sags the logs. There is no upward strength supporting the length of the logs other than where they touch at the notches.
The wood blocks, then, as chinking material add structural strength, insulation, and a solid surface for the daub mix to adhere. The wood blocks also free float between the logs (not nailed to logs at all, but tightly wedged in) so that seasonal shrinking and expansion of the logs affects them very little, and if daubing does fall out, the wood shows between the logs, not rusting wire.