got a real urgent one here...I've tried to wake up a Whitelabs Burton to no avail. Use by date is Aug 16, so I used a pint starter but after a good 12 hours still no activity. I really want to brew tonight but I've only got two packets of coopers dried yeast and 3 packets of cascade dried yeast. I'm making a partial porter and I'm thinking of chucking in all 3 packets of cascade. This a bad move? Should I wait for the Burton if she's a bit sluggish? Tommorow's Sunday and nearest HBS is bloody miles away and I've got no car until Monday. Any advice is good!