Didn't think of hazelnuts as growing here but that fellow is in North Dakota, so should be fine in Montana. One of my favorite nuts!
What do chestnuts taste like? I've never had one.
Is there any problem with them hybridizing with horse chestnuts? I ask because I have a horse chestnut tree and of
course those are poisonous (tho the dogs think they're delicious and eat a great many of them). And it's already some sort of hybrid, intermediate between a couple wild types. The seeds germinate madly and if it weren't for squirrels, they'd take over the world.