It took 2.5 years but it looks like we are finally getting mushrooms from the bit of inocculating we did. My uncle had a large bag of mushroom spore, but no good trees. I, of course, have lots of trees, many in bad shape. So we cut one down; got his truck stuck; (who buys a two wheel drive truck in Maine?); winched it out; and the logs up drilled holes; added mushroom spore; sealed with wax; and ‘planted’. Then we waited. And waited.
Today, I went out and saw a number of mushrooms on one of the logs. The others had similar growths. a quick sanity check on the Internet confirms that we have shitakes. Woot!