I wouldn't recommend wearing armor for something like this, as you'll need to be flexible to go over and through obstacles, and 3-4' deep water, over floating logs, under barbwire in the mud, etc....
Will be awesome to see what other costumes show up - although from the YouTube videos I've seen, most are simple Pirate, Spartan, Viking, or other simple "warrior" style characters. The Luchadors fit perfectly since we'll be flexible, and also have appropriate knee and elbow padding.

And if any marks get a little cute, we'll be sure to rough 'em up good and protect the business, old school!