Yeah. I actually mark the locations of all oak trees on my map and I avoid cutting them down unless it's a dire emergency. If I need fine wood I'll go farm some from the Plains or grab a few Birch from the Meadows. I think I've gotten 4 acorns from the oak trees I have had to cut down. Beech trees on the other hand... I have a lumber farm and I pretty much either break even or come out ahead on beech seeds when I harvest.