Don't forget your lid lifters. I have 4 and always take 3 with me to DOGs.
Keep an eye out for charcoal sales. I stock up so I have plenty to take with me. Everyone has a favorite brand but Kingsford Original is the one I see used most often at DOGs.
A good place to get spare ladles, spatulas and other utensils is at one of those dollar type stores. Yard sales and thrift stores are two other good sources. Cheap utensils can be sturdy and won't affect your cooking. Plus they are cheap enough that they aren't a huge loss if they do get lost which sometimes happens.
Metal plates or enameled metal plates can handle drops, heat and other aspects of camp cooking without breaking. After putting up with broken plates and melted melamine for a number of trips I finally bought a set of Ozark Trail enamelware dishes on sale at Walmart (
link). It doesn't chip on the edges like the old speckleware did.