I burn them all, but most of next year's wood will be sugar maple. I had one dying sugar that I had to take down last fall because A new shop I was getting would have been in jeopardy. That tree was no longer good to make saw logs or I'd have sawed them. So far I've cut and split maybe 1/4 of the tree and about half that much again will fuel my evaporator for the next season. I will also be burning some hemlock slab off my sawmill.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.