My wife and I really need to plan on getting back there. We went in 2006 and 2008, and that's it. So it's been 4 years now.
I suggest saving up some money when you plan to go. There's a lot of shopping opportunity, and it's not all the same stuff you see at renfaires. It's shopping for reenactors and enthusiasts.
Need poles or hanging shelves for the tent? Garb? Leather or linen or trim by the yard? Grommets or aglets? Mail hauberks? Pewter pilgrim badges, or gilt spurs? Boxes, baskets, chairs. All sorts of things to be had. You can show up with just a credit card and a wad of cash, and furnish your encampment that way.