It's hard to argue that they're making it for 'reservation consumption,' but ....
If they don't transport the product, what's the beef?
I can stockpile 100 gallons of homebrew per person over 21 in my house at any given time ... do I NEED 100 gallons of brew?
Fuck yes I do. Armageddon and stuff.
For all we know they were gonna bury that shit for future reference. Probably not, but ... until the crime has been committed, there's no crime. As an american I can stockpile all the shit I want (legal shit, that is) ... and from what I can tell, those guys had a legal grow. The Feds can't assume it's for interstate sale ...
Well, actually, obviously they can - but they shouldn't.
Saw a news article today - a cat in California died in a car and decomposed. When they got to his house, he had 1,200 firearms and literal tons of ammo. That's not illegal - unless they're illegal guns, etc. No law is broken until it is, right?