Wyeast Smack Pack stuck at FedEx
 

I had to go out of town unexpectedly and had to have FedEx hold my shipment at their facility until I come home.
There is a Smack Pack in there, shipped with an ice pack, but I won't be able to pick it up until tomorrow morning. Meaning it will have been sitting for 4 days at FedEx and not in the fridge.
What are the chances the yeast survived?
I'm guessing I should smack it when I pick it up and if it does swell make a starter to help them grow.

The yeast will be fine. They live at ambient temps just great.

I had the same thing happen to me, they ship it with a cold pack which will only last so long, but even after it will be just fine.

I received two wyeast packs after they sat over the weekend 5 days total. They came fully expanded, I was able to just barely pop the inner pack by pinching it. I made a starter and had a great fermentation.

You should always make a starter with liquid yeast, as it only contains +/- 100 billion cells.

I always make a starter with liquid yeast...I was just wondering if there would at least be enough viable yeast for a starter.
Good to know others have survived the same ordeal

The yeast will be fine and you should be making a starter with liquid yeast anyways. Go to http://www.yeastcalc.com, plug in the numbers and make the starter you need.

Got my package and the Smack Pack was already swollen from the released CO2 from it being at room temp for a few days. I couldn't smack the nutrient pack, but it didn't seem to matter as I just added some yeast nutrient to the starter and it is fermenting away just fine!
Had a nice thick yeast cake this morning.
Got to get these little guys ready for my "It's a Celebration, Bitches!" IPA