You really only need 1-2 tablespoons of the salt per roast. I’ve done up to three roasts in this amount of salt. Making less juniper salt is tricky though, especially if you have a large food processor, so I don’t recommend halving the recipe. I like to store the roasts in large tupperwares in the fridge, but one gallon ziplocs work well too. Leave the roasts in this dry brine overnight or up to 3 days.