Im making a 2 gallon batch of pumpkin ale and my recipe only requires half a pack of Wyeast 1272. My question is can i save the other half for a near future brew? I am considering making a starter, and putting it in the fridge inside of a paper bag to keep the light, but im not sure if my yeast will stay alive long this way. Normally i would just throw the other half away, but at $7 a pack each + shipping i would like to use. Any thoughts are greatly appreciated...brew on!!!!