I joined several of my guildmates from Everquest at the Heartland Games, one of the Lorien Trust LRP gatherings, over in England. This was a big event too, I don't know the exact numbers in attendance but there were several hundred tents set up out there, at least. There were food, clothing, armor, and weapons vendors out there as well. The whole thing lasted 4 days, with a number of games and interesting role-play throughout.
The Everquest guild I was in, House Rea'Morda, was originally based on the LRP guild you see here. It is a mainly drow (dark elf) guild, members of the Tarantula faction. The first half of the pictures are Rea'Mordans, and the last half are a little more random, some of various characters, some just of the landscape and the big manor house on the property.