but I'm not brewing for 8-9 hours. Is this okay??
I brought this up a few weeks ago. The pack was cartoonishly large, but it didn't break. I've yet to hear of any popping from overinflation.
You could have a small starter at full krausen by pitching time, though, if you're into that.
You should be fine, I have yet to have a smack pack break on me.
of whether the yeast has a "peak" activation period, and then tapers off, or if it was okay to wait. It's too late anyway, I went to bed and am now getting ready to brew. The pack is still huge.
I was worried it would "deflate".
It won't deflate and it is fine to wait. I usually smack the morning before I make the starter and let it swell all day (12-14 hours) while I am at work.