Long story short I had some kids and never got around to brewing a batch I'd purchased. I've got 2 batches including yeast, but I'm pretty sure the yeast is toast (dry yeast packets). The grain is uncrushed, since I mill my own. I've had it for about 18 months. Is it still good? If still good I might chance the yeast and see what happens, then just get more if it turns out to be a dud.