Drake's IMO3 substrate is 1 part wheat mill run to 1 part wood chips by volume, with optional 5% biochar. (Cho's Solutions, p. 18) Moisten it to 60% moisture. (Cho's Solutions, p. 18)
Wood chips add texture so the pile holds its shape. Dog food adds the fats, oils, and protein the microbes need. (Office Hours Ep. 113, 34:09)
On chips already full of mycelium, Drake says not to worry much. Soil mycelium outcompetes the wood-decomposing fungi as the IMO process moves along. (Office Hours Ep. 95, 1:00:53) To be safe, soak the chips in saltwater first. (Office Hours Ep. 95, 54:40)
The library does not give chip size, fresh versus dry, or which New York woods to use.