Video taken walking up and down the aisles of the vendor hall at MegaCon 2018.
I think I covered every aisle but not the entire artist area. This gives you a pretty good idea how big (and crowded, especially on Saturday) it is. It took nearly an hour to do the walkthrough and I wasn't stopping to look at stuff. This is the perfect Where's Waldo game if you were walking around there on Saturday :).