Like Sotty said...I wouldn't. Yeast is best kept sealed, cool, and in a dark area. I keep my open yeast packets in a ziplock in the freezer.
Your best bet is mix as needed. Unless you are creating mixes for individual containers, but I still wouldn't recommend that. You can't accurately just mix up a bunch of sugar and yeast and expect to scoop it out as needed and have the correct amounts of each.