2th, if you really can't stand killing off perfectly good seedlings (I can't anyway), you can just rinse the dirt off their roots and gently separate them when they're 4-6" tall and repot/replant them. They take abuse pretty well. Clipping all but the best is easier though.

I just transplanted a couple dozen pawpaw root suckers that I flagged in the summer. The internet says they won't survive, but I had at least 75% survival last year. I have a couple hundred pawpaw and persimmon seeds stratifying in the fridge, too. Need to get them planted before long.

If you figure out how to foster chanterelles, I'd love to hear about it. I have a hillside patch 75 yards from the back door that produces a bunch if it rains in the summer, but intentionally growing them would be neat.