Okay, yes, you might be figuring out your luggage space while the con is underway, pushing your clothes aside to drop a box or two in the suitcase and compute what will likely still fit: "Hmm, one KOSMOS, a Hans im Glück, two Lookout 2p, a handful of AMIGOs, and a few other oddball items."
Then you discover something wonderful and suddenly you're contemplating how much can fit in your carry-on bag.
Should you find yourself in that situation, I offer some packing advice in this video, along with teasers for SPIEL '19 releases that might find their way into overview videos down the road: