It'll be fine. I've gone over a month without issue. Just be careful as mice LOVE milled grain. They ate a hole in the top of my bucket trying to get at it once. Probably best to leave it in the house and not the garage.
On Tap: Belgian Pale Ale, Session Porter, American Brown Ale, Rum Barrel-Aged Wee Heavy, Beer Camp #118 Grandma's Closet
On Deck: Oud Bruin, Blue Corn Saison, Weizenbock, Berliner Weisse, Pomegranate Cider