I think we could just bring a box with loose bricks for trade. Easiest in my opinion.
Easiest, but hardest. If everybody just brings random stuff and everybody has to paw through each other’s box to see if there are any goodies they want, that’s a lot of time/energy on site. As compared to Greg’s idea with the BL store, where it’s energy spent in advance, and a quick and painless shopping experience… hard to say what’s best, but I personally get frustrated quickly with PaB redemption from LUG inventory, or pawing through the tables/bins the sellers have at PBF or BrickFair… or with feeling CMF bags, say. I can do it, but the cost-benefit ratio of the time it takes to find what I want isn’t always productive for me. But that’s just, like, my opinion, man…