Yep.... I remember the Hairy Buffalo, mostly we just called them Trash Can parties though. But those already had a significant amount of alcohol in them to kill any little critters compared to fresh cooled wort. I don't know... I think that too much worrying is just as bad as too many cooks... RDWHAHB. I worried way too much for a while with brewing, and the more I worried the less my beer became. Its the simple, less worrisome things that really shine.
Honestly, IMO... IBU calculations are bs... just some numbers thrown in in order to place some sort of unknown value on bitterness. Its like asking how hot is hot, or asking someone else if you would like what they like. Most of the recipe calculators assign far too low of a bitterness value imo. Then there is different types of bitterness calc's, Rager, Tinseth, etc. etc. etc.
Pinnah, just Do It and tell us what You thought of it and what if anything you would do differently next time. Thats how I roll from now on... I'm the one thats gonna drink it.